Not to be confused with Overlord (1994 video game) or Overlord (2007 video game).

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

The game was initially released for the Amiga and Atari ST computers in the beginning of 1990 and later in the same year it was ported to the Commodore 64 too, but released only in the very beginning of 1991. Nearly one year later in late 1991 the game was ported to MS-DOS.

The game was also ported to the Nintendo Entertainment System in 1993. The NES cartridge has an internal battery to retain game saves; the computer versions came on two disks.

The NES version was among the last titles released for the platform and is relatively rare. The NES version is also noted for having very few sounds or music (mainly just the title theme composed by Jeroen Tel).

A Hungarian group of Commodore Plus/4 enthusiasts ported the game to the Plus/4 in 1993.

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. There are four skill levels, each represented by an enemy race, and each featuring a progressively stronger opponent. The more advanced a system is, the more freedom a player has when purchasing spacecraft. Higher skill levels also result in different numbers of planets in each system.

The game is controlled using a mouse pointer, and important information is displayed in a message box at the bottom of most screens. Following the introduction screen, the player chooses which planetary system to enter. Planetary systems differ in the number of planets they contain, the types of spacecraft and equipment that can be purchased, and the strength and aggressiveness of the artificial intelligence. The first system contains eight worlds and allows access to only the most basic equipment. The second system has sixteen planets and slightly better equipment. The remaining systems increase in size and strength similarly.

The player and his opponent both begin with control over a single colonized planet in the chosen system. All other planets in between are uninhabited and up for grabs. The player then must set up and maintain thriving colonies on as many planets as possible, and build 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.

Before building a colony, planets need to first be terraformed using an atmospheric processor. As a planet's population grows, more taxes can be sent to a player's home starbase. However, in order to survive, colonies need to be supplied with food and energy. The player provides food by buying and placing farming stations on the colony, or by transferring them on starships as cargo. Energy comes from purchasing orbiting solar satellites, but can also be transferred as cargo. Cargo shipments consume fuel, so the player needs to also purchase mining stations. Balancing these and similar factors constitutes the main challenge of the game.

As the player expands his or her empire, he must also create planetary defenses. Defense is achieved by building and maintaining defensive ground armaments on a world. The ability to attack comes from purchasing a battle cruiser and arming it with combinations of both homing and ballistic missiles and hover tanks, then sending the ship to attack an enemy planet's defenses. Planets are taken by eliminating all ground defenses on an enemy world. The only way to win control over a system is to attack and conquer the enemy's starbase in that system. The only way to beat the game is to take the starbase of the last system, Yottsu. Likewise, if the player's home starbase is defeated, the game ends and the player loses.

The NES version game could be considered an early example of real-time strategy, allowing direct control over missile launch, and hover tanks (1 on the map at any given time) on the offensive side, while offering direct control over the plasma cannon defense base and partial control over the pom-pom cannon and lightening field defense bases. The MS-DOS version did not have these units, and so could only be remotely considered for this classification.

Game events

Throughout the game the player will receive messages that affect some or all of your planets, ships, equipment, or storage levels on worlds. Some are beneficial while others are harmful, and nearly all of them require immediate action by the player.

• Technological breakthroughs are improvements made to equipment or medicines, such as a new fertility drug which greatly increases population growth, new engines for ships that make them more efficient, new mining or farming methods, etc.
• Warnings are messages explaining negative events, such as heavy acid rain falling on a world and therefore causing much damage there, medical problems with previous technological breakthroughs, major enemy military movements, or a toxic gas leak on a planet that results in losing the civilian population (any ground bases remain unaffected). Enemy threats also appear here.
• System reports will relay messages such as successfully saving a game, that a ship has departed or arrived at a planet, the total credits available at the starbase, a civilian revolt on a world (which also results in losing the planetary population), and ion storms in the planetary system that can greatly add or subtract energy supplies. Occasionally a message will appear that the player's Atmospheric Processor has broken down, causing the player to have to purchase another.
• Military updates inform the player when his or her battlecruiser has reached an enemy world and is ready to attack it. These messages also relay whether a planet has been successfully defended, or whether it has been taken by the enemy.

If the game is played for a long enough time, most of these events will occur multiple times.