Horde mode: A type of game mode in co-operative multiplayer games. Players work together to defend one or more objectives or simply to have at least one man standing as they fight through discrete waves of enemies, with each subsequent wave featuring more numerous and powerful enemies. Such modes often include elements of tower defense games where players can deploy defensive tools such as turrets or traps to injure or slow enemies. The game may offer short periods between waves where players can spend in-game currency or similar points to improve their defenses, their equipment, or similar boosts. Horde modes can be based on a fixed number of waves or in an endless mode where players attempt to last as long as possible.