Gamma64 is a homebrew game for the Nintendo 64, a likely later iteration of Gamma 64. Its development would build upon the lessons learned and capabilities demonstrated in earlier versions.  Gameplay would depend on its features, potentially expanding upon or refining aspects of previous versions.  The developers are likely individual hobbyist programmers within the homebrew community.

Gamma64 V1.10

GameBooster 64 (Europe) (v1.1) (Unl)