Multiplayer online battle arena

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Multiplayer online battle arena (MOBA)^[a] is a subgenre of strategy video games where two teams of players compete on a predefined battlefield, each controlling a single character with distinctive abilities. These abilities become more powerful as the match progresses, allowing characters to contribute more effectively to the team's overall strategy.^[1] The typical objective is for each team to destroy the opponents' main structure, located at the opposite corner of the battlefield, while protecting their own. In some MOBA games, the objective can be defeating every player on the enemy team. Players are assisted by computer-controlled units that periodically spawn in groups and march forward along set paths toward their enemy's base, which is heavily guarded by defensive structures. This type of multiplayer online video games originated as a subgenre of real-time strategy, though MOBA players usually do not construct buildings or units. The genre is seen as a fusion of real-time strategy, role-playing and action games.

The first widely accepted game in the genre was Aeon of Strife (AoS), a fan-made custom map released in 2002 for StarCraft, in which four players each control a single powerful unit and, aided by weak computer-controlled units, compete against a stronger computer.^[2][3] Defense of the Ancients (DotA) was created in 2003 by the Warcraft III modding community for Warcraft III: Reign of Chaos and its expansion, The Frozen Throne, with a map based on AoS. DotA was one of the first major titles of its genre and the first MOBA for which sponsored tournaments were held.^[4] It was followed by two spiritual successors, League of Legends (2009) and Heroes of Newerth (2010), as well by a standalone sequel, Dota 2 (2013), and numerous other games in the genre, such as Smite (2014) and Heroes of the Storm (2015).^[5][6]

By the early 2010s, the genre had become a big part of the esports category. In 2018, prize pools reached over US$60 million, 40% of the year's total esports prize pools. Major esports professional tournaments are held in venues that can hold tens of thousands of spectators and are streamed online. A strong fanbase has opened up the opportunity for sponsorship and advertising, eventually leading the genre to become a global cultural phenomenon.^[7]

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