Portal: Still Alive

Portal: Still Alive is a standalone Xbox 360 version of Portal that differs slightly from the game’s original release as part of The Orange Box.

The visual quality has been reduced to accommodate the limited game size of Microsoft’s XBLA service. In addition, fourteen new levels have been created based on the fan game Portal: The Flash Version, with the levels later modified to the original game’s 3D Source engine architecture. The new stories are unrelated to the plot and do not feature GladOS as an omniscient companion. The extra content was made accessible to owners of the original Windows game. This version includes developer feedback as well.