Imperium is a strategy simulation game in which the player is the Emperor of a region of space. The player can micromanage every part of their empire, from building spaceship fleets to establishing alliances and ensuring loyalty from their vassals. The game is entirely menu-driven, with each icon representing a different action the Emperor can perform that turn.
Imperium was released on the PC, Atari ST and Commodore Amiga in 1990. The game should not be mistaken for the 1992 SNES shoot 'em up from Vic Tokai with the same name.