Realspace 3 takes place where the last game, Realspace 2: Emperor’s Revenge, leaves off- The destruction of Earth.

The United Fleet needs you! Command the legendary Antaris and blast back the evil Katuri from our home system. The Earth has been destroyed. Human kind hangs by a thread. We must find a place the Katuri could never conquer to make our last stand, we must fight our way back to where it all began; Apocalypse Outpost.