Tower defense

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Part of a series on
Strategy video games
Subgenres 4X Auto battler Multiplayer online battle arena Real-time strategy Time management Real-time tactics Tactical RPG Tower defense Turn-based strategy Turn-based tactics Artillery Wargame
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Tower defense (TD) is a subgenre of strategy games where the goal is to defend a player's territories or possessions by obstructing the enemy attackers or by stopping enemies from reaching the exits, usually achieved by placing defensive structures on or along their path of attack.^[1] This typically means building a variety of different structures that serve to automatically block, impede, attack or destroy enemies. Tower defense is seen as a subgenre of real-time strategy video games, due to its real-time origins,^[2][3] even though many modern tower defense games include aspects of turn-based strategy. Strategic choice and positioning of defensive elements is an essential strategy of the genre.