ERA ONE places the player in a future where the human political system has been destroyed. After a catastrophic gravitational event paralyzed mass migration, societies aboard giant space cities are at war over dwindling resources. Mutated biominers pose a constant threat to the entire solar system. In this environment, a woman named Alya De Chars tries to obtain a power source for a secret ship, striving for a new beginning. The gameplay combines real-time strategy with the construction of bases and warships.