Excerpt: Shoot two portals onto a flat surface and walk through one to appear out the other. This reasonably straightforward game premise is destined to go down alongside "form horizontal lines to make blocks disappear" and "avoid missing ball for high score" as one of the most deviously, deceptively simple in the medium's history.
Conclusion: So short that you can beat it in less then three hours (that's how much it took me on my first try). So once you beat it, you will be begging for more. So that's portal, one of the best and funniest games ever created. If you don't know about it, you should definitely go and play this game and discover if The cake is really a lie.
Excerpt: You wake up in a room without knowing why you're there - white walls, transparent doors, all very sci-fi - like cult horror film The Cube spliced with the video for Björk's All is Full of Love. A computerised female voice, one that you'll never forget, barks from some unknown origin, guiding you through the Aperture Science Laboratories test program. A portal appears, you walk through, but wait, something's up - you can see yourself entering it - or is that exiting it?
Excerpt: Finally, you can now download Portal to your Xbox 360. It seems ridiculous that 360 owners have had to wait a year to do so, forced (well, you should have wanted to, really) into buying Valve's brilliant The Orange Box compilation just to get a taste of one of 2007's best games. But there you go. That's capitalism for you... or something.
Conclusion: So, you have the large collection of the original test chambers found in the first game, then a totally new collection of the new challenge map chambers that you can unlock, along with the developer commentary feature and 12 all new achievements in a totally new and standalone version of Portal in Portal Still Alive. Not a bad deal for 1200 msp and being instantly downloadable only on the Xbox LIVE Arcade.