Riot Games announces the promised co-op versus A.I. mode is live in League of Legends, their Defense of the Ancients-inspired strategy game. This trailer shows off the new mode, and here's an outline of how this works: "Players will now be able to square off against a team of enemy AI bots on Summoner’s Rift, one of LoL’s well-known maps. Players will be able to select from either “Beginner” or “Intermediate” skill level, then join with a team of allies seeking a similar challenge. This fast, convenient way of finding matched cooperative sessions makes for the perfect practice venue for players who are either just starting out or testing the skills of a new champion before battling live opponents."