Hello! Welcome to my first crossover, a Teen Titans/Portal one to be exact! So, yeah, the story may not have a lot of action in the first chapter or two, sorry, but trust me, it's to build the plot.

It started off innocently. Really, it did. All Starfire wanted to do was go to the "mall of shopping," as she put it. Robin couldn't say no, not to her, with her big, open eyes and slightly quivering lip… when she did that, he melted like butter in a microwave. Butter that was later crushed between the arms and chest of an alien princess, but you got used to it after a while. It could be worse, like being thrown out of a window and into the ocean, but, the narrator digresses…

The rest of the Titans wanted to go, so one Saturday, Jump City's teen guardians decided to go shopping. Of course, there was going to be a problem. Two Titans-a small green one in particular-had decided that it was a good idea to try and make Raven get a video game, to show her that they weren't a "huge waste of time and energy" like she claimed. Raven protested at first, but it was very obvious that he wasn't going to shut up until she did. No amount of tossing into the ocean was going to change that. There was also Robin suggesting she should, to "better connect" with her teammate. Finally, Raven had given in and agreed to get a game.

"As long isn't going to kill my brain cells," said Raven, putting the game onto the counter.

"Oh, it won't, trust me," the clerk told her. He ran the item under a scanner and put it into a bag. The cost rang up on a screen, and Raven pulled out the money. "Sometime, if you want, you could come over and we could play co-op," he said, leaning towards the empath. The look in his eyes was not one Raven liked-that of a hormonal male trying to hook a fish, and unknowingly failing miserably.

"No, thanks, the big guy'll want to play," said Raven, laying the money on the counter and nodding towards Cyborg, who was busy talking to Beast Boy about some new racing game. The clerk looked over at him, at swallowed hard.

"Oh, ok then. Enjoy your purchase!" he said defeated, handing Raven the bag with the game inside. She walked away, towards Beast Boy and Cyborg.

"We're leaving," she told them bluntly. The look in her eyes told that ten new games were enough for now.

"Okay, Raven," the two answered simultaneously, not wanting to see what had made her this way, and the three of them walked to the food court, where Robin and Starfire were.

"…No, Starfire, you can't order mustard as a drink in the mall," they heard Robin telling Starfire.

"But, it is delicious, yes?" she asked.

"Well, yeah… But most people don't drink it."

"Then what do you do with it?" At this point, the triad of Beast Boy, Raven, and Cyborg had met with them.

"Star, we put it on food. Hotdogs, hamburgers, and such," Cyborg told Starfire. "It's really good."

"Oh! Friend Cyborg, tell me, why do you eat dogs that are hot?" Starfire asked, confused about why anyone would eat such a thing. Dogs were cute, the few times she'd seen one that wasn't green. Cyborg stammered for a moment.

"Uh… It's not what it sounds like. I'll show you," and with that, he walked over to a hotdog stand.

Finally, the Teen Titans had returned to their tower. Starfire had enjoyed the hotdogs with mustard immensely, and Cyborg was secretly regretting showing her. He'd have to share his meat, and he did NOT look forward to that. What he did look forward to, however, was Raven's game. He'd gotten a look at it-in fact, he was the one who had showed it to her. He, too, appreciated a game that made you think, but he'd never get over beating the green one's butt in racing. Ever.

"So, Raven, you gonna play your game now, or do you wanna wait to see me beat Cy in Turbo Racers II?" Beast Boy asked. Raven took all of maybe half of a second to decide. It wasn't that hard of decision for her; watch Cyborg beat Beast Boy and listen to him complain about losing, or get to try something new?

"I'll play, Beast Boy," she said quickly.

"Okay, I'll set it up for ya!" said the changeling, and took off towards the back of the Ops. What am I getting myself into? she wondered to herself, watching her teammate plug in a small, boxish system with wires hanging off of it. "The game, Raven, I need the disk." She opened it and floated the disk over to her smaller, green teammate. "Portal? What's this game?" he asked, closing the top of the system.

"Okay, your all set up, Raven," he said.

"Thank you, Beast Boy," Raven said, and walked over to the couch and sat down. She picked up the controller, and hit a blue button on it. How can they stand this? It's so bulky… Raven wondered. However, the narrator has decided to step in and say that this may result from the fact that her hands were much smaller than her friends. She watched onscreen as music played. A bald man appeared, but you could only see the back of his head in the gray tone. What was disturbing, however, was the fact that the man had a visible valve on the back of his head, plain as day. Just sticking out of his head. Internally, Raven recoiled. Externally, the rest of the Titans did.

"Ugh!"

"EEK!"

"Dude!"

"Aw, man, that ain't right."

"Raven, what kinda game is this?" Beast Boy asked.

"I don't know. Oh look, it's gone. And just opening credits, too," Raven replied. The music wasn't bad, though. She could listen to music like that a lot. Onscreen, a simple menu appeared. She selected "Start" and watched as a loading screen popped up. After several moments, a bright white filled the screen. A strange, computer-like female voice began speaking as the screen showed the inside of a small room with clear walls.

"Hello, and, again welcome to the Aperture Science computer-aided Enrichment center. We hope your brief detention in the Relaxation Vault has been a pleasant one. Your specimen has been processed, and we are now ready to begin the test proper. Before we start, however, keep in mind that although fun and learning are the primary goals of all Enrichment Center activities, serious injuries may occur. For your own safety, and the safety of others, please refrain from…." Here, the voice fizzed out, sounding incomprehensible, gargled, and strained. After a moment of what seemed to be Spanish, the voice continued. "Stand back. The portal will open, in three…. two….. one." The voice sent shivers up Robin's spine as he listened. He knew it was just a game, and that it was just some voice actress speaking and having her voice altered, but still…. There was definitely something off about it. As if it wasn't actually in the game as a character, but rather was speaking through the game to you. And he didn't like that.

"Starfire," he whispered, "let's go do something else, somewhere else." She replied with a nod, and the two left silently. The others were intrigued by what was happing onscreen. After the countdown, a large orange oval opened on a panel near where Raven's character, whom they had not yet seen, was standing. Raven made the character walk towards the oval, and was shocked at what she saw: a woman clad in an orange jumpsuit, in a room identical room, with an orange oval in front of her. The strangest thing, however, was when Raven went to move her character, the other woman moved too. After several back and forth motions, Raven understood that she was seeing her character through this… portal, as the voice had said. Raven followed the path that appeared to be prompted for her to travel. She looked back at the portals, and saw the one she had left was blue. Somehow, these two portals allowed her to travel to places that she assumed she wouldn't be able to otherwise. Interesting. It was similar to her own dark portals in terms of transportation, but any differences, other than color and being able to see through them, would need to be determined later.

She walked through a doorway, which sealed behind her. In the medium-sized white room, a large red thing sat on the floor. It appeared to be…. Well, it didn't appear to be anything. The only thing that made some sense was the string of blue dots that ran along the floor to a box with an 'X' in it near another round door. Suddenly, a large cube dropped from a clear pipe in the corner. A prompt to click a certain button on the controller said that it would pick up an object. Seeing nothing else, Raven commanded the character to go over and pick up the cube. By some unseen means, the cube moved when she clicked the button, and floated in front of the character. Now what do I do with this thing? she wondered to herself.

"Put it on the red thingy!" Beast Boy offered. Raven did, and a noise sounded. The door had opened, the blue dots changed to yellow, and the 'X' had become a checkmark. The computer spoke again.

"Excellent. Please proceed to the chamberlock after completing each test," and such began Raven's adventure. Beast Boy and Cyborg would occasionally give advice, not that Raven needed it. Soon, Raven had been equipped with the "portal gun," a strange white thing with three prongs on one end. She had been instructed not to "look at the operational end of the device," and to not "submerge the device in liquid, even partially." She soon discovered the concept of the strange portals: using them to travel between to places, or to move things to her. Raven had started finding solutions with remarkable ease-she could make her own in real life, so she was familiar with the concept. Throughout the course of the game, aside from allowing small smirks at the strange female voice's comments, she began to think of ways she could use her own portals in fights against criminals. She couldn't wait to Dr. Light's face when he was suddenly falling from the side of a building when he had just been running away….

During one test chamber, she received a cube that was normal, except that it had pink instead of the light blue circle, and there were hearts on it. It was called a "companion cube," most likely due to the fact that it was the only cube in the level. However, when the voice had instructed her to euthanize it, she stopped for a moment. There was nothing wrong with the cube-it was actually really useful, serving as a step, holding buttons so she could go through doors, and saving her character from death by energy pellets. But since the game did not advance, she decided to drop the cube into the incinerator. Raven felt immediately regretful, but couldn't explain why. It's just a stupid cube in a game, Raven. The voice spoke.

"Congratulations. You euthanized your faithful Companion Cube more quickly than any other test subject on record." Raven felt some guilt, but pushed it quickly aside. There were presumably more tests for her to do, and darn it if some stupid heart-covered cube was going to make her stop.

And that's a wrap. Enjoy it? Love it? Hate it? I won't know unless you review, so go ahead and hit that review button and type away! And if you have any ideas, feel free to PM me them. I'd love to hear them.

—makerboy13