Combat Moonbase is a set of rules for tactical spaceship combat using 1/400 miniatures. Rules are provided (in Attack Wargaming's inimitable style) for lasers, missiles, plasma torpedoes, ECM, chaff, and landing and taking off from planets. Information is provided for three types of ships, two from the Eastern Coalition and Western Alliance (who are fighting over the titular moonbase) and one from the alien Thook.