GLaDOS is returning. Microsoft today announced that Portal: Still Alive will hit Xbox Live Arcade this fall. Not a true sequel, Still Alive will feature new challenges and achievements, in addition to the entire single-player experience from the Valve-developed original.

The game was touted as an “Xbox 360 exclusive” at Microsoft’s conference. Keep in mind that this does not completely rule out a PC release, as Microsoft was likely referring to consoles in general.

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