Essentially, you and another player square off in an arena (duh), each controlling a team of four heroes in a battle for supremacy. It's your basic MOBA fare, but with a smaller battle zone and a slower, more deliberate pace. You and your opponent receive two minutes each to make your moves, or you can try the game's asynchronous mode and play several games simultaneously, with up to two days being allotted for turns.
Arena of Heroes has officially shifted into open beta, so you're free to check it out at your leisure. You can also read our hands-on with the game for a more detailed look at its inner workings.
The free-to-play game will launch on PC, Mac, iOS, and, at some point, Ouya and Android.
[Thanks to Venova for the tip]