Just a single, solitary game update on the Xbox LIVE Arcade (XBLA) service this week - but it’s a really good game!

Portal: Still Alive, for a meagre 1200 Microsoft Points, is available for your first-person puzzling pleasure. As they are keen to remind us, the original Portal was the winner of over 30 Game of the Year awards, and this new version comes complete with 14 new bonus maps, developer commentary and, obviously, the whole original game that set the gaming community on fire last year.

Also a reminder that Grand Theft Auto: San Andreas is currently available as an Xbox Original, as well as the availability of a demo for Scene It? Box Office Smash! and a bunch of new Nirvana tracks for Rock Band, all available on Xbox LIVE Marketplace now.