Cosmo Warrior Zero (コスモウォーリアー零, Kosumo Wōriā Zero) is a science fiction third-person shooter video game released by Taito.

Warius Zero lost his family in the war to the machinemen but despite this he still is a member of the Earth fleet that is now working in concert with the machine men.

His ship, made up of both humans and machine men, has been given a near impossible task: capture the space pirate Captain Harlock.

While Zero struggles to accomplish this task, evidence begins to surface that the peace between machine men and Earth may not be as it seems.

After having his wife and child disappear in the battle between the humans and Machine men, Zero has no choice but to serve Earth's government as a Captain of second rate ships.