I forgot, that I also use 40K minis for games of Strange Aeons!
Inquisitor retinues vs. Daemons and Xenos work great in this game!
People also played the "In the Emperor's Name", which was later re-skinned as In Her Majesty's Name for Osprey and Steampunk games.
Edit: Forgot these:
Stargrunt
Dirtside II
Gruntz