DotA 2 is one of the most exciting, replayable and addictive competitive experiences around. Though there's a lot of learning you'll need to do to get up to speed, the payoff is a sophisticated, complex team-based experience. The required investment of time and energy, combined with the meticulously designed gameplay, produce a hugely satisfying sense of fulfillment when you win. On the flip side, it also means an all the more crushing sense of failure when you lose, but it's worth the risk!!