The
Jamestown soundtrack is pretty amazing. Besides the already mentioned (especially
Meat Boy and
Isaac) I also really like the following, check'em out:
World of Goo (free)
Trine
Trine 2
Nitronic Rush (free)
Shatter
VVVVVV
FEZ
Puzzle Dimension (free)
If soundtracks wanna make you play the corresponding game, you know that's a good OST.