Portal: Still Alive Coming Exclusively to Xbox 360 (Updated)

An expanded edition of Valve's wit-driven puzzle effort Portal will hit Xbox 360 this fall as an exclusive downloadable Xbox Live Arcade release, Microsoft announced today.

In addition to the already-released single-player game, the Xbox Live Arcade edition of Portal will include additional test chambers through a new challenge mode, and new achievements.

Traditionally, a game's status as "Xbox 360 exclusive" refers to consoles, not PCs--suggesting that a PC release of Portal: Still Alive is quite possible, especially given Valve's past emphatic support of the platform.