Your goal is to stay alive for as long as you can, while your vital energy decreases over time and the only way to recover it, is by taken down your opponents. Slash them with your Electric-Katana, or blow them up with your Heavy-Gun.

As you keep on playing, unlock lots of deadly weapons, from swords, maces, and spears, to machine-guns, flame-throwers, and rocket-launchers, alongside new Arenas and cool character skins.

But the crowd wants more. They cheer and scream for their preferred fighter, and throw objects into the Arena. Be it an Item that helps you, like a powerful weapon, or something to slow you down, like a Molotov Bomb to set the stage on fire. They're all here for the show, the spectacle, and they want to testify Sacrifice - the climax of these combats, when blood enough from dead fighters fill the Arena and activate massive traps, that allows you to kill lots of enemies at once, but in a miss, can bring your own death.

Thousands, from all clans and all parts, come to Iron City, the eastern side of Earth in the future. From the heat of the Void Desert and the freezing White Lands, from underneath the Fields of Metalium, or the Eden City floating up in the sky.
They are here in hunger for metal, violence, and death. In this combat perverted-ritual, they worship God-Machine, the sentient A.I. created by men, that now is his worst enemy and executioner, but also a deity for the ones that surrendered to his dominance.

As a futuristic samurai-robot, you're here to serve the God-Machine as the Cyber-Metal music plays loud, but strange human feelings arise in your digital consciousness. Something that will lead you to seek answers while survive by the sword. Are you brave and skilled enough to endure?