Nelson’s Wars is a set of free wargames rules for naval games in the age of Napoleon.
rules
Imperial Guards Vs Zombies Rules
Imperial Guard vs Zombies is a set of modifications for Warhammer 40K
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.”
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.