TeamXbox writes: "It would probably be editorially unsound to cut and paste Will Tuttle's review of the original Portal into this space, write "plus some new challenge levels", and call it a day. For one thing, Portal was originally part of the The Orange Box review, and therefore didn't get a unique score of its own. Plus it would make me look like a bad, bad game reviewer.
But honestly, the Portal that's now available on Xbox Live Arcade is almost exactly the same game, with the addition of 14 new challenge levels and 12 new achievements. There's no extension of the story mode or any sort of other special exclusive features in Portal: Still Alive. That's not necessarily a negative criticism, but it is something you should consider if you are a Portal fan and considering parting with a hefty 1200 points."