Valley of the Apes is designed as an adventure game for kids. Players create their own jungle terrain, scatter the encounter tiles (with hazards or treasures) across the valley, and send bands of toy soldier figures to seek fame and riches.
rules
High Crusade Science Fiction Rules
High Crusade are a set of free wargames rules for 15mm / 25mm science fiction games.
Wrath of the Gods Fantasy Skirmish Game
Wrath of the Gods is a set of free wargames rules for skirmishes with a classical mythological flavor.
The Sword In The Philippines Rules
Larry Brom’s The Sword and the Flame may be as close as anyone has come to a “universal” wargames set. Here’s a variant of the game for the Moro Rebellion and the US Involvement in the Philippines: The Sword In the Philippines
Warhammer American War of Independence
Warhammer American War of Independence is a Warhammer AWI variant.