Heroes of Newerth (S2 Games, creators of the Savage series) or "Defense of the Ancients," the Warcraft 3 mod that inspired it, but haven't tried it for yourself. Maybe you've been waiting for just the right nudge to push you out the plane door and send you plummeting into HoN's waiting arms. Consider this your shove: S2 is running a free-to-play event from now until Monday, August 9 and registration is live right here.
Still clinging to the edge of the plane like an obstinate gremlin? We've got a little more persuasion for you in the form of an exclusive trailer after the break.