League of Legends recently reached a total of 15 million registered players. Perhaps the most surprising thing is that all of those players have played their matches on just two different maps, one made specifically for Defense of the Ancients-style 5v5 play, and one made for 3v3 combat (there are a few other maps in the game, but they're used for training, not full game modes).

That's about to change. Last week, Riot Games invited Joystiq over to its headquarters in Santa Monica, California, to see a brand new game mode for the online competitive title. It's coming along with what Senior Producer Travis George calls "the biggest update we've ever made for League of Legends," a new content release subtitled Dominion.

Dominion is a brand new gametype and is especially notable because all of the games in the growing DotA (or MOBA) genre have basically used the same premise: two armies of minions fight with equal strength across a series of parallel lanes, and player champions fight minions and each other to gain ground and win the battle. Dominion, however, is a brand new set of rules, combining elements of the DotA genre with scoring, much more akin to EA's Battlefield games or Call of Duty's Domination mode.