Imperial Settlers: Atlanteans, an expansion that needs the base game to play, adds the option for playing Imperial Settlers with up to 5 players. The expansion has a new faction board, the Atlanteans faction deck, technology tokens, and expansion cards for the original factions that complement the Atlanteans abilities.

The Atlanteans bring a new resource to the world of Imperial Settlers with technology that can unlock special abilities on faction cards and transform normal buildings into powerful allies. The Atlanteans must use their abilities to find new ways to score because their faction buildings sink at the end of the game and do not score points! While the other factions do not have the knowledge to use the technology of the Atlanteans, some buildings for each faction gives them to use some of that technology to their advantage.