Purely functional games
A recent blog post entitled " Follow up to functional programming doesn't work " recently caused a bit of a stir, encouraging Haskell programmers to dredge up the nearest things Haskell has to real computer games. A Super Mario clone , Frag (a reimplementation of part of Quake), a Gradius clone , 4Blocks and a game that blows all of the others away called Bloxors: This beautiful little OpenGL-based puzzle game weighs in at just 613 lines of purely functional code (many of the other games use unsafe* functions to introduce uncontrolled side effects). This is also one of the few programs that cabal install actually works on. Check it out here !