Supremacy: Your Will Be Done, released as Overlord in the United States, is a strategy video game designed by David Perry and Nick Bruty and produced by Probe Software.

The NES cartridge has an internal battery to retain game saves; the computer versions came on two disks.

The goal of Supremacy is to create and protect a network of planetary colonies and defeat a computer adversary who is trying to do the same.

The game is controlled using a mouse pointer and important information is displayed in a message box at the bottom of most screens.

Planetary systems differ the types of spacecraft and equipment that can be purchased, in the number of planets they contain and the strength and aggressiveness of the artificial intelligence.

The player must set up and maintain thriving colonies on as many planets as possible, while building up an industry and military strong enough to fend off the opponent.

Because of the randomness of a system's initial make-up, the order in which planets are colonized has a great subsequent effect upon gameplay.

The message area is much larger in the other versions, and placed along the right hand side of the screen, compared to bottom center of the NES game.

Finally, the use of the docking bays is more complex in the home computer versions, which also feature an image of the face of the enemy that grows clearer the closer the player is to completing the game.

Reviewers commented on the game's playability and accessibility as a strategy title, as well as the range of different ways to play it.