Defense of the Ancients (DotA) is a custom scenario for the real-time strategy video game Warcraft III: Reign of Chaos and its expansion, Warcraft III: The Frozen Throne, based on the “Aeon of Strife” map for StarCraft.
Defense of the Ancients pits two teams of players against each other: the Sentinel and the Scourge. Players on the Sentinel team are based at the southwest corner of the map, and those on the Scourge team are based at the northeast corner. Each base is defended by towers and waves of units which guard the main paths leading to their base. In the center of each base is the “Ancient”, a building that must be destroyed to win the game.

Each human player controls one Hero, a powerful unit with unique abilities. In Allstars, players on each side choose one of ninety-five heroes, each with different abilities and tactical advantages over other heroes.The scenario is highly team-oriented; it is difficult for one player to carry the team to victory alone. Nevertheless, some heroes, given enough time, can change the outcome single-handedly, while countering the opposing team’s heroes. Defense of the Ancients allows up to ten players in a five versus five format and an additional two slots for referees or observers, often with an equal number of players on each side.Defense of the Ancients pits two teams of players against each other: the Sentinel and the Scourge. Players on the Sentinel team are based at the southwest corner of the map, and those on the Scourge team are based at the northeast corner. Each base is defended by towers and waves of units which guard the main paths leading to their base. In the center of each base is the “Ancient”, a building that must be destroyed to win the game.[4][5]

Each human player controls one Hero, a powerful unit with unique abilities. In Allstars, players on each side choose one of ninety-five heroes, each with different abilities and tactical advantages over other heroes.[6] The scenario is highly team-oriented; it is difficult for one player to carry the team to victory alone.[7] Nevertheless, some heroes, given enough time, can change the outcome single-handedly, while countering the opposing team’s heroes. Defense of the Ancients allows up to ten players in a five versus five format and an additional two slots for referees or observers, often with an equal number of players on each side.