Crunchy, lo-fi electronic beats with a retro pulse. GLtron is a 1997 open-source Tron lightcycle game, and the soundtrack is bare-bones in the best possible way. "Revenge of the Cats" leads with this buzzy, driving beat that sounds like late-90s demoscene energy.
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The extended mix stretches it out and lets the groove build. Then there are six tracks all called "Subsong" which is the most 90s freeware thing ever. The whole vibe is minimal and repetitive in that hypnotic way old PC game music used to be.
You loaded up the game, the track looped, and you just zoned out dodging light trails. If you miss when game soundtracks were just some guy making tracker music in his bedroom at 3AM, this takes you right back.