A war-game is a type of game that simulates warfare. The most popular war-games are RISK, Kriegspiel, Paintball, and Stratego. RISK is a board game where players compete to conquer the world by controlling armies and territories. Kriegspiel is a chess variant where players can't see their opponent's pieces, making it more challenging. Paintball is a sport where players use paintball guns to eliminate opponents. Stratego is a board game where players use strategy to capture their opponent's flag.