SGS Imjin War is a deep, historically themed strategy wargame that reenacts the Imjin War (1592-1598), when Japanese forces invaded the Joseon kingdom of Korea. The game emphasizes operational-level decision making, asymmetric play, and historically flavored combat and diplomacy. Matches can be long and demanding, with the grand campaign covering up to 105 weekly turns and an average playtime exceeding 18 hours.