The Black Heart is a versus fighting game which took Argentine developer Andrés Borghi seven years to create using Elecbyte's M.U.G.E.N. engine. There are six playable characters to choose from, each with their own set of special moves that can be executed using simple key press combinations. In addition to the basic attacks, players can also charge up their energy gauge and perform a powerful fatal move to finish a duel in style.

The game also features a couple of gameplay modes separate from the main story campaign, with support for hotseat multiplayer also included.