Carnage Heart is a video game for the PlayStation, developed by Artdink. Its gameplay is a mecha-based, turn-based strategy game, where the player takes the role of a commander in a war fought by robots. The robots, called Overkill Engines (OKEs), cannot be directly controlled in battle; they must be programmed beforehand to behave in a certain way under certain conditions using a flow diagram system.

Zeus Carnage Heart Second - a sequel with a new storyline, programming was similar but otherwise significantly different from the original Carnage Heart. Again the player can program every move that the mecha makes yourself according to circumstances. The program is laid out by every individual step taken in flowchart form. The game takes place in the year 2198 after the events of the first game.