GV: "Over the past few years, real-time strategy games have changed. For some time, developers refused to innovate, but slowly they've adapted, taking more creative risks. Oftentimes, these changes are spurred by the genre's active community and the tradition of shipping RTS with level creators. In Warcraft 3 alone there are thousands of custom levels in circulation, the most popular of which is Defense of the Ancients. DotA takes the "Hero units" of Warcraft and builds the gameplay around them, turning the RTS into more of a competitive action game. It isn't official by any means, but that has given the creator the chance to allow it to grow on its own, relying on community interaction instead of oftentimes ill-informed executive decisions."