Composer Grant Kirkhope started working for Rare in 1995 and made the music for games like Goldeneye, Banjo-Kazooie, Perfect Dark, Donkey Kong, Grabbed by the Ghoulies and Viva Pinata. Via Bandcamp you can buy the soundtrack to these classics and pick whatever price you want. So you can get it for free (or close to it), but if you want to support his work, you should pay, well, what you feel is appropriate.
Link: https://grantkirkhope.bandcamp.com/musicGrant Kirkhope's Bandcamp page</a>.