VVVVVV.
&
sanic generations has some pretty good music
megaman 2
sanic adventure 2
earthbound
mother 3
portal 2
banjo-kazooie
banjo-tooie
lego racers
lego racers 2
terraria
half-life 2
there are some other OSTs i'm missing, i'm sure
and there are some games where i like only a few songs