With the Portal 2 review now live, we've noticed some users in the comments of the video review are wondering, "Why is this review only for the Xbox 360 version?" Good question! Here's your answer:
We received the Xbox 360 version last Wednesday (April 13). We did not receive the PlayStation 3 and PC versions until Monday (April 18), and the PC version was not playable until it unlocked on Steam last night around 9:30 p.m. This gave us plenty of time to play the single-player and cooperative campaigns on the 360 version, but very little time on the other platforms. Even now, we are playing the PS3 and PC versions and testing the cross-platform play through Steam. The multiplatform reviews you read on GameSpot often read very similarly, but each one is backed up by time spent playing the game on that specific platform.
So while it may seem strange to review a game from Valve Software, a historically PC-first developer, on the Xbox 360 first, it would be even stranger (and downright dishonest, to be frank) to publish a PC review without spending quality time with the game. Speaking of which, time to get back to work!