Flat Out War, from Oversoul Games is touted as a set of universal rules for 25mm miniatures. It’s for “experienced gamers,” since it does not explain or illustrate a lot of common terminology.
Miniatures Rules
Platoon Action WWII Skirmish Rules
Platoon Action is a set of skirmish rules for WWII. The author writes:
Platoon Action is a skirmish-level game of World War II combat. Figure scale is one man to one man; ground scale is not exact, but about 1″ to 5-10 yards. Typically a player might control up to an infantry platoon (three squads of about ten men each; perhaps an HQ section); optionally supported by a few heavy weapons or vehicles. Although there are vehicle rules, it should be noted that these are primarily rules intended for infantry combat.
Mindstalkers: Mission Middle Ages
Mindstalkers: Mission Middle Ages is a set of rules for skirmish games in a medieval setting.
Loose Files and American Scramble
Loose Files and American Scramble by Andy Callan was one of the first American Revolution games that I played. Originally published in Wargames Illustrated in 1987, it is a lot of fun.
De Bellis Armatis
De Bellis Armatis is a set of free wargames rules for ancient warfare.