Reception and Legacy

The popularity of Defense of the Ancients has increased over time. The scenario was featured by Computer Gaming World in a review of new maps and mods in Warcraft III. DotA Allstars became an important tournament scenario, starting with its prominence at the debut of Blizzard's BlizzCon convention in 2005. DotA Allstars was also featured in the Malaysia and Singapore World Cyber Games starting in 2005, and the World Cyber Games Asian Championships beginning with the 2006 season. Defense of the Ancients was included in the game lineup for the internationally recognized Cyberathlete Amateur League and CyberEvolution leagues. Additionally, the scenario appeared in Electronic Sports World Cup (ESWC) 2008;  Oliver Paradis, ESWC's competition manager, noted that the high level of community support behind the scenario, as well as its worldwide appeal, were among the reasons it was chosen.
The scenario is popular in many parts of the world; in the Philippines and Thailand, it is played as much as the game Counter-Strike. It is also popular in Sweden and other Northern European countries, where the Defense of the Ancients-inspired song "Vi sitter i Ventrilo och spelar DotA" by Swedish musician Basshunter reached the European 2006 charts at #116 and cracked the top ten Singles Charts in Sweden, Norway, and Finland. LAN tournaments are a major part of worldwide play,  including tournaments in Sweden and Russia; however, due to a lack of LAN tournaments and championships in North America, several teams disbanded. Blizzard points to DotA as an example of what dedicated mapmakers can create using developer's tools.
In June 2008, Michael Walbridge, writing for Gamasutra, stated that DotA "is likely the most popular and most-discussed free, non-supported game mod in the world". In pointing to the strong community built around the game, Walbridge stated that DotA shows it is much easier for a community game to be maintained by the community, and this is one of the maps' greatest strengths. Former game journalist Luke Smith called DotA "the ultimate RTS".

Defense of the Ancients has been credited as one of the influences for the 2009 Gas Powered Games title Demigod, with the video game publication GameSpy noting the game's premise revolved around aspiring gods "[playing] DotA in real life". Guinsoo went on to apply many of the mechanics and lessons he learned from Defense of the Ancients to the Riot Games title League of Legends. Other "DotA clones" include S2 Games' Heroes of Newerth.