They can be old or new, obscure or mainstream, post what you like. I'll post a few random favourites to get the ball rolling...
C64 Arkanoid Music - YouTube
Arkanoid - Loader Theme (C64)
[TOP 100] RPG Town Themes #2 Terranigma - YouTube
Terranigma - Hometown (SNES)
Deus Ex - DuClare Chateau - YouTube
Deus Ex - Chateau DuClare (PC)
http://www.youtube.com/watch?v=boLnfGE_vjQ
Wipeout 2097 - Body in Motion (PSX)
Diablo I & II Soundtrack - Tristram Village - YouTube
Diablo - Tristram (PC)
C64 Arkanoid Music - YouTube
Arkanoid - Loader Theme (C64)
[TOP 100] RPG Town Themes #2 Terranigma - YouTube
Terranigma - Hometown (SNES)
Deus Ex - DuClare Chateau - YouTube
Deus Ex - Chateau DuClare (PC)
http://www.youtube.com/watch?v=boLnfGE_vjQ
Wipeout 2097 - Body in Motion (PSX)
Diablo I & II Soundtrack - Tristram Village - YouTube
Diablo - Tristram (PC)