Imperium Rex

Imperium Rex is a freeware turn-based strategy game similar to Empire. The main objective is to build up an empire by conquering all opponents and neutral cities. Up to three players can participate in a hot seat or play-by-email game. Each player typically starts with just one city and a few units, and needs to explore the world, gather resources, expand, research new technologies, trade on the global market, build armies and support infrastructure to eventually defeat the opposing player(s). Single-player games are limited to the practice mode where the goal is to conquer all neutral cities, which are not defenceless but will not expand or attack the player on their own.