From least to most recent:
Lego Indiana Jones (360), came with my new 360, after the old one RROD'd. Haven't completed it. It's not as fun as the Star Wars Lego games.
The Longest Journey (PC), started it, but my PC acts weird. I'm gonna have to upgrade soon anyway, so I'll wait a bit with this one. I'm anxious to experience it through the end though.
Bioshock (360), beaten the evil ending, which was crap.
Eternal Sonata (360), beaten it. Weird at the end, but all in all pretty satisfying.
Kung Fu Panda (360), just started it. Also packaged with my Xbox and it's been gathering dust. It'll probably be a quick and easy romp (that's what she said!)