A Strategy Game is a game genre encompassing Board Games, Tabletop Games, and Video Games in which the player or players' strategical and/or tactical thinking is required in order to achieve victory (in theory). The earliest strategy games are far Older Than Feudalism, including ancient games like Chess (invented in the 6th century) and Go (invented in the 4th century). Strategy Games break down roughly into two sub-genres: Artillery Games also fall within the genre of Strategy Games, though some are turn-based and others are real-time. For tropes found in Strategy Games, see Strategy Game Tropes. Also, see: Strategy RPG and Simulation Game for business sims and similar games often lumped together with Strategy Games.