"Science isn't about why, it's about why not. You ask: Why is so much of our science dangerous? I say: Why not marry safe science if you love it so much. In fact, why not invent a special safety door that won't hit you in the butt on the way out, because you are fired."
Welcome back to the Aperture Science Enrichment Center
-Cave Johnson, Founder and CEO of Aperture Science
Portal 2 picks up ("centuries" from) where the original left off. You take on the role of "Chell," the human test subject of the Aperture Science Handheld Portal Device, only this time you are joined by a handful of new characters:
, the aforementioned Founder and CEO of Aperture Science, who is dead. Or is he? Well, yes, he is. However, he is still able to write memos and help Chell via the Aperture Science Speaker System. Voiced by J.K. Simmons, also known as J. Jonah Jameson (or that guy from those insurance commercials), a series of videos were released hyping the game in recent weeks, the last of which just came out today (here's all 4):
, a Personality Core, he wakes Chell up and trusts her to catch him as he prepares, unadvisably, to detach himself. From then, they try to find their way out, but stumble across the complete opposite of their desires in the form of the returning...
Genetic Lifeform and Disk Operating System (GLaDOS)
, the driving, maniacal sentient computer controling Aperture Science, and trying to keep it all together. GLaDOS informs Chell that she is not angry at Chell for attempting to murder her, and would like to repair their relationship.
And so continues the saga, in the name of testing the Handheld Portal device.
But wait, there's more!
In addition to the single player campaign that Portal 2 has to offer, there is also a Co-Op Campaign mode, which takes place (sequentially) after the events of the Single Player mode. However, since humans cannot be trusted (as mentioned in the above vignette), the Cooperative section of the Enrichment Center features two robots:
ATLAS and P-body
, referred to as Blue and Orange by GLaDOS, are those two robots. They must work together to solve the most complex tests in Enrichment Center.
That's your basic information about the world of Aperture Science. Of course, there's more to it than that, but we don't want to spoil the fun. In fact, let this be your reminder that ruining the story for people is not cool, use spoiler tags and mark all spoilers.
And now, here are some neat things (behind a spoiler, because they will probably spoil things, so you might want to play the game first):