Free Stuff – Mirsoft.info, World of Game Music
If you are looking for the best collection of old video game music, Mirsoft.info has what you are looking for. You will find most MOD file music for most Amiga games and early to mid 90s DOS and Windows games as well. You can also find a ton of MIDI music from games such as Doom, Duke Nukem 3D, etc.
The link to the site is the following: http://www.mirsoft.info/