Lately it's been the Ion Maiden soundtrack, which is uneven but very good in places. More recently discovered Thunder Force IV, which is magic in the form of FM synth. Duke Nukem 3d has some great tunes like Stalker and Aliens Say Your Prayers.
#1, though, is Wrong Number. Three hours of Carpenter Brut and Perturbator and all that great darksynth.
Soundole did an album of VG town themes called "Winds of Home" you all might get a kick out of.