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It's a FPS with jumping tanks. Grab flags on the ground and get special abilities.

The main gameplay element is that when a tank is in the air it keeps its rotational momentum and you have no way to correct the trajectory mid air. Sometimes you have to jump and aim on the right or even backwards and this all gets down to injecting the exact quantity of movement prior to the jump with the mouse (a nice addition beyond the classical pointing mechanics of FPS).

Tanks can't tilt, but hopefully they can jump, so another saillent part of the gameplay are mid-air duels, when two tanks facing each other start firing, jump to avoid the slow-moving orbs, and carry the fight into the air.

It looks like a caricature, but it has great mechanics that could make a good basis for an e-sport. If e-sports are introduced into the Olympic Games and they decide to look for an open-source game, BZFlag would be a good contender.