Just found dis for the GBC
A development build of the unreleased Katakis 3D for the Game Boy Color.
hiddenpalace.org
by Manfred Trenz
Wow! Thanks for posting this - never heard of it either.
Stage 1 was wild! Very cool. I was like, "Hey that's the graphics from Rendering Ranger!" then I realized who did this. The fact this was developed when the GBC was relevant is also crazy. This should've been made.
Edit: just sat down with this again to see how much is in the proto. It's a full damn game. Highly recommend. Starts out easy, gets pretty scrappy towards the end. I noticed it doesn't have a game over screen, just keeps respawning after you lose all your lives, so that sucks. But so damn impressive. The music is some of the best I've ever heard on the hardware. It's as if Future Crew made a game. I would happily fork over money if someone finished this and sold it.