The Sword, The Flame, Machine Guns and Grenades is a World War II adaptation of Larry Brom’s The Sword and the Flame rule set.
WWII
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).
Panzer Troops WWII Rules
Panzer Troops is a set of free wargames rules for WWII battles. The rules are intended as an introduction to historical wargaming.
World War II Role Playing Game
The World War II RPG by Mikko Kauppinen is designed as a simple game that is deadly to low level characters, but that allows more powerful characters to do very cinematic actions. Characters have three attributes and a number of skills. Action resolution is done by rolling 1d6, subtracting the result from the relevant attribute and adding one. If the result is more than zero, the character has succeeded, and bigger numbers mean greater successes.
Red Flags and Iron Crosses
Bob Corderey offers Red Flags and Iron Crosses, a set of free wargames rules for playing World War II games in 20mm. The rules focus on small actions between Soviet and German forces.