That'll be the Follin brothers, and mainly Tim Follin, he made countless soundtracks of C64 games, if you want more info,
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If you've heard the amazing soundtracks to "Bionic Commando", "Ghouls And Ghosts", and "Black Lamp" on the Commodore 64, that was Tim Follin. If you've spooged over the music to classic titles like "Rock And Roll Racing" and "Plok" on the Super Nintendo, then that was the Follins too. And even coming right up to the present day, the amazing music to "Ecco The Dolphin" on the Dreamcast was done by Tim Follin. It's Tim Follin who's perhaps best known (and he's still in the industry, currently working on "Starsky And Hutch" for Empire and "Pillage" for Warthog/Zed Two), but many people forget that a number of Tim's later soundtracks were composed with Geoff (who's now a primary school teacher), and Geoff has a number of genius soundtracks he can take sole credit for. Oh, and the third brother, Mike Follin, nowadays training to be a vicar, was the coder of many of the early Follin-soundtracked games, including the all-time-classic "Sentinel".