The question what is Dota 2 will be asked more times this month than at any other point in the game’s past or future. Valve is presently hosting the marquee Dota 2 tournament of the year, The International 4 (TI4), and its incredible $10.5 million prize pool has garnered attention from corners of the world that wouldn’t traditionally care about professional gaming. At its most basic, Dota 2 is an online multiplayer game where two teams of five compete to siege and destroy each other’s base. The biggest hurdle to getting more people sucked into the same vortex of compulsive gaming is the vast amount of prior knowledge that’s required to understand and play Dota 2 well.