German release was censored.
About Portal - Still Alive
It seems that this game was never published alone on X360 - is it part of The Orange Box or is it a mispelling for Portal: Still Alive ?
Part of Orange Box at least, can't remember if it was released separately for it anymore. That was added back when there was some confusion with compilations.
A stand-alone version called Portal: Still Alive was released on the Xbox Live Arcade service on October 22, 2008
So I guess it could be treated as it.