Into the Darkness is a set of simple free wargames rules for skirmishes.
The author writes:
Into The Darknessis a tabletop war-gamefor two players. It is played on a 4×4 board, with each player alternating taking turns. Each player controls one (1) team, which may comprise as few as three but as many as nine models. Each model is given three points with which to purchase gear, though points may be gained with experience.
Charles and David Sweet were among the founders of American wargaming. Here are his rules for ancient wargaming.
Here are a set of rules from the man who is arguably the “Father” of American Wargaming, Jack Scruby: Basic Wargaming Rules.
Tournament Joust is a free print and play game with some really good looking jousting mechanics. It has paper knights, but you’ll want to swap in your own miniatures.
Space Battles is a set of free wargame rules designed for HO Scale science fiction miniatures.