Riot Games' soon to be released title, League of Legends, is taking the Defense of the Ancients gameplay mainstream
Back in 2003, a custom game scenario called Defense of the Ancients (known by fans as DotA) was made for Warcraft 3. This modified multiplayer map basically took the game’s hero classes, and made them the core game mechanic with support from AI controlled minions. The scenario was an instant hit and within only a few years the game reached worldwide popularity. It became arguably the world’s most popular unsupported game mod, even finding its place in tournaments like the World Cyber Games. Now in 2009, developer Gas Powered Games is trying its hand at a modified version of the game marketed towards more than the mostly hardcore audience that has enjoyed it to this point.