Dota 2

Dota 2 is a 2013 multiplayer online battle arena (MOBA) video game by Valve. The game is a sequel to Defense of the Ancients (DotA), a community-created mod for Blizzard Entertainment's Warcraft III: Reign of Chaos. Dota 2 is played in matches between two teams of five players, with each team occupying and defending their own separate base on the map. Each of the ten players independently controls a powerful character known as a "hero" that all have unique abilities and differing styles of play. During a match players collect experience points and items for their heroes to defeat the opposing team's heroes in player versus player combat. A team wins by being the first to destroy the other team's "Ancient", a large structure located within their base. Development of Dota 2 began in 2009 when IceFrog, lead designer of Defense of the Ancients, was hired by Valve to design a modernized remake in the Source game engine. It was released for Windows, OS X, and Linux via the digital distribution platform Steam in July 2013, following a Windows-only open beta phase that began two years prior. The game is fully free-to-play with no heroes or any other gameplay element needing to be bought or otherwise unlocked. To maintain it, Valve supports the game as a service, selling loot boxes and a battle pass subscription system called Dota Plus that offer non-gameplay altering virtual goods in return, such as hero cosmetics and audio replacement packs. The game was ported to the Source 2 engine in 2015, making it the first game to use it. Dota 2 has a large esports scene, with teams from around the world playing in various professional leagues and tournaments. Valve organizes the Dota Pro Circuit, which are a series of tournaments that award qualification points for earning direct invitations to The International, the game's premier tournament held annually. Internationals feature a crowdfunded prize money system that has seen amounts in upwards of 40 million, making Dota 2 the most lucrative esport.