FunGEn is a BSD-licensed, cross-platform, OpenGL-based game engine written in #Haskell. Created by Andre Furtado in 2002, it's the oldest Haskell game engine and still one of the easiest ways to get started with Haskell game development. I have released a cleaned-up https://hackage.haskell.org/package/FunGEn 1.2, tested up to ghc 9.6.
I don't have time to do more with it, but it's still useful - would you like to take it over, make a slick home page, and build more haskell games ?
