First up, we know it will be released by the end of the year. Secondly, we know that it will feature new chambers, new levels and a new game mode, but that it won't be tied in with the storyline of the previous game.
Thirdly, and most interestingly, we know that it isn't exactly what you'd call an 'exclusive' as Microsoft originally claimed. Portal Still Alive will actually be a combination of the levels found in the totally free PC versions of Portal The Flash Version and Portal The Flash Version Map Pack.
It figures that everyone who has Xbox live will have a broadband connection and therefore will have a PC. So, apart from scoring themselves a few extra achievement points, why the hell would anyone buy Portal Still Alive?
We don't know about you, but there's not a chance in hell we'll be forking out for free content.
Check out our Portal review
Source :: Chris Remo