Imperial Guard vs Zombies is a set of modifications for Warhammer 40K
Miniatures Rules
1450 – 1550 Renaissance Wargames Rules
1450 – 1550 is a set of free wargames rules for playing miniature games set in the renaissance. The author says it’s “slightly more complicated than Tactica.”
Doom: The Next Chapter Role Playing Game
Doom: The Next Chapter is both an RPG, and a tabletop strategy game based in the Doom universe. It is a great example of how role playing mechanics can carry over to miniatures gaming.
Shellshock Combat System
The Shellshock Combat System is a comprehensive set of free wargames rules for WWII, Modern and Science Fiction combat. Designed for micro scale (1/285), it features three “levels of play”: basic, advanced and “blitzkrieg” (fast play).
Free Heavy Gear Rules From DP9
For the summer of 2012, Dream Pod Nine is offering free pdfs of their Heavy Gear rules.