Empire! is a single-player game blending action, strategy, simulation, shooter, casual, and arcade elements, where players pilot a small Cub Scoutship through space, trading, fighting aliens, and completing missions to expand their galactic empire. In this game, players start in the Abatlu system with the goal of building a vast empire across the stars, involving complex tasks such as upgrading ships, trading at starbases, and navigating warp holes to other planets, all while avoiding hazards like plague-infested worlds. It stands out with its combination of fast-paced arcade gameplay and strategic empire-building, requiring players to manage resources, combat alien invasions, and construct a frontier shield to enclose their territory, offering a rich and challenging sci-fi experience.