As Chell and the core moved away from the turret control center, the temperature suddenly dropped and frost formed over every surface around them.

Great. Ice again, Chell thought, shivering. The core kept glancing back at her as they walked, his optic smaller than usual.

They passed a room with several potato batteries on display with posters clearly made by young children. "Bring Your Daughter to Work Day," the core read, "That did not end well. And… forty potato batteries. Embarrassing. I mean, I realize they're children. But still, you know, low hanging fruit and all that. Barely science really, is it?"

They left the room and made their way down catwalks into the neurotoxin generator room. With little difficulty, Chell destroyed it by cutting the pipes connected to it. The generator imploded, breaking the tube in the adjacent room.

"HA! The tube's broken! We can ride it straight to her!" the core exclaimed, "I can't hold on! Come on! Come on! We have to go!" Chell entered the room and was immediately sucked into the tube along with him.

The pair flew through the pipe, ice covering the inside and out.

"This should take us right to her. I can't believe I'm finally doing this!" the core said excitedly, "Woooo! I knew this would be fun! They told me it wasn't fun at all, they said 'It's not fun at all!' and I believed 'em! I'm loving this! Whale of a time!"

The tube carried them into an open area, with tubes going in all directions. "This place is huge, and we're only seeing the top layer. It goes down for miles! All sealed off years ago, of course," he explained, "We should be getting close. Ohh, I can't wait to see the look on her face. No neurotoxin, no turrets, she'll never know what hit her! Especially if you use your, ah, you know…" He chuckled nervously. Their pipe intersected another, and the core was knocked into the second one by a cube. "Aggh! I'm going the wrong way! Get to her! I'll find you!"

The tube deposited Chell on a catwalk. She made her way up a set of stairs into a destroyed hallway, with one part leading into open space. In the distance, she saw the massive cylindrical shape of the Central AI Chamber, with the glass hallway that once connected to it completely broken off. Near it, a flickering light illuminated a white surface. With nowhere else to go, she portaled over to it, falling into a small room with no portable surfaces she could use to escape back out and a door labelled "GLaDOS EMERGENCY SHUTDOWN AND CAKE DISPENSARY. KEEP UNLOCKED." Knowing it was a trap, but with nowhere else to go, Chell braced herself and opened the door. It fell over with bare wall behind it.

"I honestly, truly didn't think you'd fall for that," GLaDOS taunted as the panels making up the walls began to move, scraping over the frost and shrinking the room, "In fact, I devised a much more elaborate trap further ahead, for when you got through this easy one. If I'd known you'd let yourself get captured this easily, I would have just dangled a turkey leg on a rope from the ceiling."

The floor slid open, forcing Chell into a Relaxation Vault below, which began to move forward.

"Well, it was nice catching up. Let's get to business."

The panels moved aside to reveal the AI glowering down at her as the vault moved her inside the chamber. The frost had already spread across most of the chamber and reached the very back as Chell entered. It was even starting to cover GLaDOS herself. The panels reformed the wall behind her.

"I hope you brought something stronger than a portal gun this time," GLaDOS said, apparently ignoring the ice for now, "Otherwise, I'm afraid you're about to become the immediate past president of the Being Alive club. Ha ha." Mechanical arms lowered turrets that surrounded the vault Chell was trapped in. "Seriously, though. Goodbye."

Chell smirked as the defective turrets tried to shoot, but caught on fire and exploded one by one, leaving the glass walls cracked, but not broken yet.

"Oh. You were busy back there," the AI remarked, still calm, "Well. I suppose we could just sit in this room and glare at each other until somebody drops dead, but I have a better idea. It's your old friend, deadly neurotoxin. If I were you, I'd take a deep breath. And hold it."

A tube entered the chamber from the back, curved around, and broke into the side of the vault. Of course, no neurotoxin came out. Instead, the core tumbled through the tube and fell into her vault, shattering the glass the rest of the way.

"I hate you so much."

Student. Chell jumped. It had been a while since her mysterious teacher had spoken to her. Look at these two machines through the Warp. What difference do you see?

Chell closed her eyes to concentrate. Radiating from GLaDOS was an aura of hatred. From the core… nothing.

I have seen a great many things in this galaxy and never have I seen a Silica Animus with a presence in the Warp, N'Kath explained.

What does that mean, exactly? Chell asked.

That machine has a soul.

WHAT?!

Try to find out why. I want to know, the voice ordered.

How?

Use your abilities to read its mind. Perhaps it knows. If it didn't have a soul, you wouldn't be able to do that. But since it does have one, you can.

Chell drew deeply from the Warp to increase her power. She looked up, locking eyes with her enemy, who glared down at her. She reached into GLaDOS' mind, finding some resistance, but forced her way through. The AI recoiled in response like she'd been struck with a gasp of surprise. Chell gained some basic knowledge of her target, much of which she already knew. She was the Genetic Lifeform and Disk Operating System, her mood was currently enraged, her physical body was in good shape, but there was a message saying she was 80% corrupt.

With little trouble, Chell broke through another layer of defenses and the AI's surface thoughts entered her mind. Most of it was… graphic depictions of her death. GLaDOS was currently imagining various violent methods of killing her, which Chell didn't find surprising, though quite disturbing. Aside from that, the AI was confused about the frost covering every surface of her chamber, and suspected Chell has something to do with it. She was also mildly concerned about the system telling her she was 80% corrupt when she felt fine.

Another layer down, Chell found GLaDOS' recent memories, which was mostly of her testing from the perspective of GLaDOS' cameras. As she expected, the AI simply doesn't remember the time Chell accidentally made the Warp visible shortly after GLaDOS reawakened. She couldn't figure out why; the memory simply wasn't there. After everything she's experienced since then, Chell was certain it had actually happened.

Chell made her way through another layer of defenses and information on the ever-changing layout of Aperture began to flood her mind. In addition to that, she saw GLaDOS' memories from further back, including some memories from before she flooded the facility with neurotoxin and killed almost everyone inside. The amount of information was starting to become too much, but she pushed on anyway.

She finally broke through GLaDOS' last layer of defense. Her mind was now an open book – and the amount of knowledge found there was completely overwhelming. Scientific knowledge, history, blueprints over every piece of technology Aperture has ever created, all of GLaDOS' memories… it was like she swan-dived into an ocean of information and immediately got tossed around by the currents. She had no idea how long she was lost in there before she managed to throw herself out of GLaDOS' mind.

Chell fell to her knees, her head pounding. She closed her eyes and clutched her head as equations she didn't truly understand swirled in her head. After a moment, she felt warm liquid start to soak through her pants. Looking down, she saw small pools of red liquid bubble up through the layer of frost on the floor. Looking around, she saw that blood was now seeping from the panels making up the walls, floor, and ceiling, initially warm, melting through the frost before freezing. GLaDOS was completely limp, her optic flickering, but after a moment she lifted herself up, shaking her head from side to side with a groan. She quickly examined the state of her chamber before locking her gaze on Chell.

"You. What are you?" she hissed.

"What happened? Wha-what'd you do this time?" the core asked.

"This time? You are behind all the strange things that have been happening, aren't you?" she said accusingly.

"Please deposit substitute core in receptacle to initiate a core transfer," came the announcer.

"He's been saying that for the past couple minutes while you two were… um…" the core explained, "So, uh, here's an idea: plug me in!"

"Core transfer? Oh, you are kidding me. Don't you dare plug that little idiot into my mainframe," GLaDOS warned.

"No, you should plug that little idiot into the mainframe!" the core countered.

Chell got her feet, her head still pounding. Ohm's Law states that the current between two points is proportional to the voltage between those two points, with the constant of proportionality being resistance. She picked up the core and made her way to the receptacle.

"Don't. Do it," GLaDOS warned again.

"Don't listen to her, do it. Do it!" the core pressed.

"Substitute core accepted," said the announcer after Chell plugged him in, "Substitute core, are you ready to start the procedure?"

"Yes!" the core replied.

"Corrupted core, are you ready to start the procedure?"

"No!" GLaDOS protested.

"Ohhhhhh, yes she is!"

"Nonononononono!"

"Stalemate detected. Transfer Procedure cannot continue," came the announcer.

"Yes!" GLaDOS cheered.

"Pull me out pull me out pull me out!" the core began yelling desperately.

"…Unless a stalemate associate is present to press the stalemate resolution button," the announcer continued before Chell could pick up the core.

"Leave me in! Leave me in! Go press it!" the core commanded.

"Don't press that button. You don't know what you're doing," GLaDOS warned.

"I think she's lying…" the core whispered loudly.

Chell made a dash for the button, but was thrown back by a panel.

"Not so fast!" GLaDOS said, "Think about this. You need to be a trained stalemate associate to press that button. You're unqualified."

Chell started to make her way back to the button, then stopped, giving GLaDOS a smirk. She used telekinesis to press the button from where she stood.

"AHH!" GLaDOS yelped in surprise and went limp.

"Stalemate Resolved."

"Here we go!" the core cheered as the receptacle slowly descended into the floor, "Wait, what if this hurts? What if it really hurts? Ohhh, I didn't think of that."

"Oh, it will," GLaDOS answered, "Believe me, it will."

"Are you just saying that, or is it really going to hurt?" he asked, "You're just saying that aren't you? No, you're not. It is going to hurt, isn't it? Exactly how painful are tal- AGHHHHH!" He was interrupted by his own scream of pain.

The area beneath GLaDOS opened up an several mechanical arms reached for her face.

"Get your hands off me! No! Stop! No!" Her voice rapidly changed from seething with anger to desperate. A wall of panels rose up to conceal the procedure. "No! No! No!" She let out a scream of agony.

The panels on the walls went limp and the chamber went dark. Then, the panels covering the central chassis lowered, the wall panels righted themselves, and the core, now placed on the chassis, spun triumphantly. GLaDOS' head had been unceremoniously dumped on the floor.

"Wooooow! Check me out, partner!" the core exclaimed, "We did it! I'm in control of the whole facility now! Whoa-ho-ho! Would you look at this! Not too bad, eh? Giant robot, massive! It's not just me, right? I'm bloody massive, aren't I? Oh, right! The escape lift! I'll call it now."

That lift will be useless. There are many layers of concrete between the roof of this place and the underhive above you.

Chell approached the lift, unsure if she should believe him. He had been right so far about her powers, but there was no way to prove if he was telling the truth about the surface without seeing it for herself.

As a final test of worthiness, kill that normal Silica Animus you just put in power and retrieve the other one on the floor.

The core was still celebrating his victory. Chell hesitated, but then stepped into the elevator.

Are you defying me? N'Kath hissed.

I have to see it for myself, Chell answered, And I'm not killing him after he helped me.

You'll regret this, mortal.

"Let me tell ya, I knew it was gonna be cool being in charge of everything, but wow, this is cool!" the core said happily, "And check this out! I'm a bloody genius now! Estás usando este software de traducción de forma incorrecta. Por favor, consulta el manual. I don't even know what I just said, but I can find out! Oh! Sorry. The lift. Sorry. I keep forgetting." The lift finally began ascending. "This body is amazing, seriously!" the core went on, "I can't get over how small you are! But I'm huge!"

He started laughing. It quickly became maniacal. "Actually, why do we have to leave right now?" he said as the lift began descending and the chamber grew dark. His tone suddenly became darker. "Do you have any idea how good this feels? I did this! Tiny little Wheatley did this!"

"…You didn't do anything," GLaDOS said weakly, "She did all the work."

"Oh, really? That's what the two of you think, is it?" Wheatley said threateningly, "Well, maybe it's time I did something then."

GLaDOS' head was pulled into the pit below Wheatley. "…What are you doing? No! No! No!"

"And don't think I'm not onto you too, lady," Wheatley turned his attention back to Chell, trapped in the elevator. The lights on the panels turned red, and they flipped up to look like they were staring at her. Sparks flew from the pit GLaDOS was dragged into. "You know what you are? Selfish. I've done nothing but sacrifice to get us here! What have you sacrificed?"

I've put my life on the line several times, Chell thought, glaring at him.

You should have killed him when you had the chance. But you didn't want to hurt your friend, did you?

"Nothing. Zero. All you've done is boss me around. Well, now who's the boss? Who's the boss?" he said with a quiet, dark voice. He brought his optic close to the elevator. "It's me!"

There was a ding and the pit opened again. A mechanical arm carrying a potato with a yellow optic emerged. "See that?" Wheatley asked, bringing it close to the elevator, "That is a potato battery. It's a toy for children. And now she lives in it!" He chuckled.

"I know you," GLaDOS' small voice came from the potato.

"Sorry, what?"

"The engineers tried everything to make me… behave. To slow me down," GLaDOS explained, "Once, they even attached an Intelligence Dampening Sphere on me. It clung to my brain like a tumor, generating an endless stream of terrible ideas."

"No! I'm not listening! I'm not listening!" Wheatley insisted, suddenly appearing insecure.

"It was your voice," GLaDOS revealed.

"No! No! You're lying!" Wheatley insisted, "You're lying!"

"Yes. You're the tumor. You're not just a regular moron. You were designed to be a moron."

"I am NOT! A MORON!" Wheatley screamed. The arm smacked GLaDOS against the elevator glass, cracking it.

"YES YOU ARE!" GLaDOS pressed,"YOU'RE THE MORON THEY BUILT TO MAKE ME AN IDIOT!"

Wheatley smashed her through the glass into the elevator with Chell. "Well, how about now? NOW WHO'S A MORON?" The mechanical arm began slamming into the top of the elevator, pushing it farther and farther down. "Could a MORON PUNCH! YOU! INTO! THIS! PIT? Huh? Could a moron do that?"

The elevator shuddered. "Uh oh," Wheatley said. The elevator's floor gave out and Chell and GLaDOS both fell.

"Oh, hi," GLaDOS said as they both rapidly plummeted, "So. How are you holding up? Because I'm a potato."

A slow clap emitted from her tiny speakers.

"Oh, good. My slow clap processor made it into this thing. So we have that," GLaDOS said dryly, "Since it doesn't look like we're going anywhere… Well, we are going somewhere. Alarmingly fast, actually. But since we're not busy other than that, here's a couple of facts. He's not just a regular moron. He's the product of the greatest minds of a generation working together with the express purpose of building the dumbest moron who ever lived. And you just put him charge of the entire facility."

There was more clapping.

"Good, that's still working."

She was quiet for a moment.

"Hey, just in case this pit isn't actually bottomless, do you think maybe you could unstrap one of those long fall boots of yours and shove me into it?" she asked, "Just remember to land on one foot."

A few moments later, the two of them slammed into wooden beams blocking the shaft, and Chell was knocked out.

Chell found herself staring up at an avian creature that towered above her. Its arms and legs were long and thin, and it had massive wings sprouting from its shoulders. The feathers of its wings shimmered a multitude of colors, more than Chell could comprehend. It had a bird like head with a large, hooked beak at the end of its long, crooked neck. It seemed to barely be able to support its own weight, leaning heavily on a massive staff and hunching its shoulders. It had clawed hands and ferocious talons on its feet. Draped over its shoulders were what looked like the robes of some kind of priest. Simply looking at it made reality seem to slip away and brought everything Chell thought to be true into question. Her legs gave out and she dropped to her knees. She looked at the ground as she could no longer stand looking at the creature without losing her mind.

I have been very patient with you, recognizing that you are wholly ignorant on all things outside this facility, N'Kath'angoras' voice thundered in Chell's mind. I am only helping you because you were born tens of thousands of years ago, long before psykers appeared amongst your kind, and yet are a psyker. I want you as part of my collection, you and the Silica Animus with a soul. But I don't necessarily need you alive to put you on display or study you. Prove your loyalty and worthiness to me as a servant, and I will let you live as one of my champions. Your orders are to put the Silica Animus with a soul back in its original body. I will not add a root vegetable to my collection. Do you understand? Say 'yes, master.'

Chell remained quiet. A sudden, sharp pain knocked the breath out of her. Then, it came again, and again, growing worse each time.

"…Y-yes… master…"

Chell opened her eyes and looked up at the elevator shaft she fell out of. A bird pecked at the potato battery in its talons for a bit before flying off with it, cawing. Chell stood up, grabbed her portal gun, and began making her way through the decrepit underbelly of the facility. She had no idea where she was going, but kept moving forward regardless. After a while, she came upon a massive vault door, opened it, and passed through the tiny door behind it.

She passed by massive metal spheres, taking a moment to look up at them in awe. Then, she found a lever that was labelled as the power breaker for the area ahead of her behind a door sealed shut. Pulling it and proceeding through the door, the lights flickered on, music played, and an unfamiliar male voice spoke from the speakers.

"Welcome, gentleman, to Aperture Science. Astronauts, war heroes, Olympians – you're here because we want the best, and you are it. So, who is ready to make some science?" said the male voice.

"I am!" a female voice chimed in.

"Haha! Now, you already met one another on the limo ride over, so let me introduce myself. I'm Cave Johnson. I own the place," the male voice announced proudly. "That eager voice you heard is the lovely Caroline, my assistant. Rest assured, she has transferred your honorarium to the charitable organization of your choice. Isn't that right, Caroline?"

"Yes sir, Mr. Johnson."

"She's the backbone of this facility. Pretty as a postcard, too. Sorry fellas. She's married. To science."

She made her way through a lobby where Cave explained that pre-recorded messages would guide people through the upcoming tests. Chell wasn't exactly surprised when, after a few more minutes of navigating through the old, broken-down facility, she found herself in yet another set of test chambers, turning on some kind of pump along the way. Luckily, the test chambers were functional enough and she could make her way higher up by solving them. Wherever she could, she used her psychic powers to cheat. She couldn't help but feel a smug thrill from skipping parts of the tests with her new abilities, even though she really only used Mind Over Matter to move cubes off ledges and such rather than use her portal gun or the repulsion gel to reach them. After solving a few tests, she activated another pump station and found herself in an open area overlooked by a building with the words "CONTROL ROOM" at the top. The elevator she needed to proceed was out of reach, so she made her way into the control room. Inside, she was met with a strange sight.

"Oh, hi," GLaDOS called. She was sitting in a bird's nest with a bird perched over her. "Say, you're good at murder. Could you – ow! – murder this bird for me?"

Chell, amused, watched the bird peck at her from the other side of the glass for a moment, but then felt a sudden, sharp pain in her head. Pi bonds are covalent bonds in which two lobes of one atomic orbital of one atom overlap laterally with two lobes of an orbital of the other atom. She shook her head. Reading that AI's mind was a mistake. She tried to focus and use Precision Telekinesis to take care of the bird. Unfortunately, the power failed, causing psychic phenomenon that made her appearance become daemonic for a brief moment.

"Yes, I know you – ow! – have freaky powers. Can you stop messing around and help me?" GLaDOS said, unimpressed.

Chell tried the ability again. This time, she succeeded. There was a sharp crack as the tiny bones in the bird's neck broke as its head suddenly twisted to the side. The dead bird slumped onto the potato battery.

"Er… thanks," GLaDOS said, muffled by the dead bird's body. Chell made her way into the small room GLaDOS was in and tossed the dead creature aside. Suddenly, the entire facility shook.

"Did you feel that? That idiot doesn't know what he's doing up there. This whole place is going to explode in a few hours if somebody doesn't disconnect him," GLaDOS explained, "I can't move. And unless you're planning to saw your own head off and wedge it into my old body, you're going to need me to replace him. We're at an impasse." There was another tremor. "So what do you say? You carry me up to him and put me back into my body, and I stop us from blowing up and let you go." Chell knew, thanks to N'Kath, that GLaDOS wouldn't actually be able to release her whether she wanted to or not. Regardless, Chell still needed to put her back in her body as per his orders. Still, Chell decided to make sure the potato knew who she was dealing with. She used Manifest Flame to summon a small fireball in her hand and gave GLaDOS a warning glare.

"No tricks! This potato only generates 1.1 volts of electricity. I literally do not have the energy to lie to you!" GLaDOS quickly added.

Chell's hair suddenly stood on end as she felt a hostile, powerful presence. There was a bestial bellowing outside.

You have incurred the wrath of Khorn and he has sent one of his servants, a Bloodletter, to put you in your place. Kill it, N'Kath ordered.

Chell grabbed the potato and stuck it on the end of her portal gun, ignoring her complaints. She ran out of the control room. Down below, in the larger open area, was a deep red, humanoid beast. Its head was elongated and horned and it wielded a massive sword.

"BLOOD FOR THE BLOOD GOOOOD!" it roared as it ran towards the building she was standing on top of. Lucky for her, it would have to climb a fairly tall wall to get to her. She was able to fend of the fear that washed over her from looking at it, but GLaDOS made a fizzling sound and her optic went dark.

Acting on instinct, she cast a psychic power at it, but it failed. It tried to climb the wall, but could not find a grip on its flat surface.

"GET DOWN HERE YOU FUCKING COWARD!" the daemon roared with rage as it repeatedly slid back down to the ground.

Chell tried the power again, and this time it worked. Barbed chains erupted from the ground and wrapped around the daemon. It struggled to break free, but failed and was thoroughly ensnared. The barbs dug into the Bloodletter and even managed to rip open its stomach. Ah, you've figured out the Foul Cage technique, N'Kath commented.

The Bloodletter was still for a moment and appeared to be stunned. Chell took the opportunity to use Manifest Flame to summon fire. She tried to hit the creature with Fire Barrage, but the flames only sputtered. She tried again, same result. She could feel the daemon's very presence interfering with her abilities. In frustration, she pushed herself, drawing more greedily from the Warp, and finally succeeded in blasting the creature with dozens of fireballs. Almost immediately afterward, there was strange burst of energy that burned her skin and knocked her backwards. Chell stood there helplessly, reeling from the blast.

Down below, the Bloodletter struggled to free itself from the chains, but only succeeded in injuring itself further from the barbs. "YOU MOTHERFUCKING PSYKERS AND YOUR BITCH-ASS PSYCHIC SHIT! GET DOWN HERE AND FIGHT ME LIKE A TRUE WARRIOR!" the Bloodletter thundered in fury.

With a mighty heave, the daemon managed to break free from the chains, but in doing so, shredded his body, leaving his skin in tatters. He clawed at the wall as his body began to fade away, bellowing "FUCKING PSYKERS AND YOUR COWARDLY-ASS MAGIC TRICKS! DIDN'T EVEN LAND A SINGLE REAL ATTACK ON ME! I CANNOT BE DEFEATED THIS WAY! THIS IS BULLSHIIIIT!"

So uncivilized, N'Kath sighed as the Bloodletter vanished.

After a few moments, Chell managed to snap out of being stunned. What happened? Did I kill it? she asked.

Killing a daemon is… tricky. Rather, you cast it back into the Immaterium from whence it came, her teacher replied. You're lucky. If it didn't so recklessly thrash around while ensnared by Foul Cage, it wouldn't have hurt itself enough to be cast back into the Warp.

Chell stood back up and looked down at the lower area, seeing no sign of the daemon. She also noticed that the lift had lowered itself and was now accessible via a portal fling. From there, she was able to make her way into an elevator.

A/N: First and foremost, the part where Chell read GLaDOS' mind. She used a power called Mind Probe. Mind Probe is an opposed Willpower test that goes for five rounds or until the target wins, whichever comes first. Being an opposed Willpower test means both the psyker and the target roll for Willpower and whoever rolls lowest compared to their score to beat wins. The more rounds the psyker wins, the deeper into the target's mind the psyker goes. If the psyker wins five times in a row, the psyker gains total access to the target's mind and all information within. If the target wins once before that, the target ejects the psyker from their mind. Like with normal psychic powers, though, Chell adds five points to her Willpower for each point of Psy Rating while GLaDOS gets no bonuses. Chell currently has a Willpower of 66 and a PR of 4 and she pushed to increase her PR by 3. In total, her score to beat is 101, which GLaDOS opposes with her Willpower of 60. This is very much rigged in Chell's favor – she can roll higher than GLaDOS and still win. If, say, Chell rolled a 70 and GLaDOS rolled a 40, Chell would still win since she got 3 degrees of success while GLaDOS got 2. With this in mind, it's not exactly surprising that Chell wins all five rounds and gets total access to GLaDOS' mind.

Soooo, according to the rulebook, that's it. Chell gets access to all the information in GLaDOS' head. However, that's a lot of information, way more than you'd expect to find in a character's head during a normal game of Black Crusade. So, as the GM (more or less), I decided it made sense for Chell to have to pass an Intelligence to test to see if she can sort through it all to find what she is looking for. Actually, I made it a Logic test since I had her put points into the Logic skill in order to align herself with Tzeentch. If she succeeded, she would have gotten the answers she was looking for. If she failed, she would wander lost in GLaDOS' head for a while and come out with 1d10 Insanity. She failed the logic test and got 9 points of Insanity. She also gained the skill Scholastic Lore (Aperture), and no, Aperture is not one of the types of Scholastic Lore you can get in WH40K.

Since Chell pushed, she caused psychic phenomenon. That psychic phenomenon turned out to be:

Bloody Tears: Blood weeps from stone and wood within 3d10 (8 + 6 + 8 = 22) meters of the psyker. If there are any pictures or statues of people inside this area, they appear to be crying blood.

While the panels in the Central AI Chamber are probably not made of stone or wood, it would have been boring if nothing happened.

Not much interesting happened with the next few psychic powers Chell used, no psychic phenomena or anything that would require a new explanation.

When Chell finds GLaDOS, she tries to use Precision Telekinesis to snap the bird's neck and fails the first time, causing psychic phenomenon:

Daemonic Mask: For a fleeting moment, the psyker takes on a daemonic appearance and gains a Fear rating of 1 until the start of the next turn. However, he also gains one Corruption Point.

GLaDOS passed her fear test and thus was unimpressed. Chell uses the power again and succeeds. After that, she uses Manifest Flame to threaten GLaDOS. She not only manages to cause psychic phenomena with that one little technique, she also manages to cause a Perils of the Warp:

Dark Summoning: Khorne's wrath swells at the arrogance of the psyker, and he sends a Bloodletter to deal with the fool. (see Chapter XI: Adversaries) The Bloodletter rips into existence within 3d10 meters of the psyker, for a number of rounds equal to 1d5 plus the daemon's Toughness Bonus. The psyker's turn immediately ends, and the Daemon may take its turn immediately. It detests the psyker and focuses all of its attacks upon the fool that unwittingly summoned it. It will not attack anyone else, even if others attack it.

Now, we enter WH40K combat. Normally, the first step is to roll for initiative to determine the turn order. However, as the description above states, the daemon's turn starts immediately, and we weren't in combat before, so the turn order will be Bloodletter first, then Chell. The Bloodletter spawns 11 meters away from Chell. It has a Fear rating of 2, so both Chell and GLaDOS test Fear. Chell passes her fear test, but GLaDOS fails. Since she is in a potato and thinking too hard makes her shut down, I didn't bother to roll for Shock and just made her shut down.

When it is a character's turn in combat, he can take one Full Action, two Half Actions, and any number of free actions within reason. Characters do not have HP. Instead, they have a Wounds stat which is a threshold for how much damage they can take before it starts to adversely affect them. For example, Chell has 10 Wounds, so if she takes 10 damage, she's fine. Once she takes an 11th point, though, she takes a Critical Hit and Critical Hit effects are applied to her based on the type of damage (Rending, Impact, Explosive, etc.) and the body part hit.

Round 1

The Bloodletter spends a Full Action moving to the base of the building Chell is standing on top of.

Chell tries, but fails, to use Foul Cage, using a Full Action. She takes a -10 penalty to all Willpower tests due to the Bloodletter's Daemonic Presence trait, not that it mattered here since she rolled a 100.

Round 2

The Bloodletter spends a Full Action trying to climb the wall. It's a shear surface, so he has to perform a -10 Athletics test. He has a Strength of 42 and has the Athletics Skill known, so he has to roll a 32 or under to succeed. He rolls a 77 and fails.

Chell spends a Full Action successfully using Foul Cage, which causes ropes, chains, and/or barbed sinew to spring out of the ground, ensnare everything in its radius, and grow barbs that dig into their victims' skin. It deals 1d10+3 Rending Damage with the Crippling (1d10), Snare (2), and Tearing qualities. First, we resolve the damage. The Tearing quality of Foul Cage means you roll an extra die when you roll damage and discard the lowest die. The highest of the two die rolls was a 10, so Chell dealt 13 damage. This is reduced, however, by the Bloodletter's Toughness bonus of 8, so he takes 5 damage. Rolling a 10 for damage activates Zealous Hatred. The attacker rolls a 1d5 (I rolled 4) and consults the Critical Hit Table appropriate to the Damage type, rending in this case. The target suffers all effects listed, but does not count as having taken a Critical Hit. So, we go to the table for Rending Critical Effects – Body and look at the effect for 4 points of critical damage, which is:

The blow opens up a long wound in the target's torso, causing him to double over in terrible pain. The target suffers from Blood Loss and is Stunned for 1 Round.

Bloodletters, however, have a trait called Blood for the Blood God, which makes them immune to critical hit effects involving gore and blood. I'm not sure how to interpret this since almost all critical hit effects involve gore and blood, so I decided to have the Bloodletter get stunned but not suffer from Blood Loss. Now, we roll 1d10 to determine the level of Crippling and get 8. When a character is under the effects of Crippling, they take rending damage equal to the level of crippling if they do more than a Half Action during their turn. This damage is not reduced by armor or Toughness, and the effects last until the encounter ends or the target is fully healed. Finally, Foul Cage has the Snare (2) quality, which means that the Bloodletter must pass an Agility test with a -20 penalty or be immobilized. His Agility is 40, so he had to roll under a 20 to succeed, but rolled a 74 and failed.

Round 3

The Bloodletter is stunned and can't do anything. However, he has the Warp Instability trait, which means that if he takes damage and does not deal damage by the end of its next turn, he must pass a Willpower Test or take 1d5 damage plus one damage or each degree of failure. The Bloodletter failed his Willpower test by 3 degrees, rolled a 5 damage, so he took 8 damage.

Chell spends a Half Action using Manifest Flame and succeeds. Fire Barrage, weirdly, is a Free Action. She failed using it twice – she needed to roll a 76 or under and rolled over 80 twice. So, she used it one more time while pushing for +2 PR to counteract the -10 penalty from Daemonic Presence and finally succeeded… with a 74. Fire Barrage deals 1d10 + Psy Rating damage; she rolled a 5 with a PR of 6 for 11 damage total, which was reduced to 3 by the Bloodletter's Toughness Bonus of 8. Since she pushed, she must roll for psychic phenomenon. She ended up causing another Perils of the Warp:

Warp Burn: A violent burst of energy from the warp smashes into the psyker's mind, sending him reeling. He suffers 2d5 wounds, ignoring Toughness Bonus and Armor, and is stunned for 1d5 Rounds.

She took 8 damage and got stunned for 5 rounds.

Round 4

The Bloodletter spends a Full Action trying to free himself from the chains with a Strength test, which he fails. Since he did a Full Action, he takes 8 damage from Crippling (Bloodletters have an Intelligence characteristic of 30; they aren't very bright). He had to take another Willpower test due to Warp Instability, but he passed this time.

Chell is stunned.

Round 5

If you're keeping score, the Bloodletter has taken 24 points of damage. Since he has 22 Wounds, he has already taken 2 points of Critical Damage from Rending. However, due to Blood for the Blood God, he is immune to the effects. This round, he again spends a Full Action trying to break free from Foul Cage. He succeeds, but takes 8 more damage from Crippling, which stack on top of the last 2 points of Critical Damage. Since 10 points of Critical Damage always kills a character, the daemon is cast back into the Warp.

Chell is still stunned as the fight ends.

Chell both performed a service to the Chaos gods and failed the Chaos gods simultaneously in this fight. She performed a service to Tzeentch by killing a powerful foe with a psychic power. She also failed Tzeentch by being incapacitated by psychic phenomena. Both these things grant her Corruption.