Oh nice - another Galactic Dan playthrough on YouTube. This is the 3D shooter I made in 1992 (before Doom!). I often think it was a basic indie game but these lines in the summary are pretty cool:
..."elevation in 3D space before Doom made it popular"...
..."pre-rendered CGI sprites (before Donkey Kong Country made it popular) and a really long draw-distance to add to the sense of scale the environment has"