#47 - Portal 2 (PC)
Nobody recognised my reference to "The part where he kills you" :(. Portal 2 was, in some respects, a dissapointing game. After the enjoyable but brief outing in Portal 1, I still felt let down by Portal 2's 6 hour playthrough. But what a 6 hours they were. Atmospheric, challenging, amusing and gorgeous to look at. And the co-op mode played with a friend was absolutely sublime - again, I wish there was more of it, but what was there was just phenomenal.
Clue for my #46 - A game featuring the original Playstation's second 'mascot'; the first in the series not to have ring outs. Not sure anyone will get this, but kudos if you do :)