The Anconian Fleet draws near and only one things stands between them and the annihilation of mankind. Can you meet this threat, or will you be trampled beneath the onslaught of the alien ships! You must use your ion cannon to destroy the gun emplacements and enemy ships. Flying through the pulsating enemy fuel tunnels on the surface of the motherships will boost your fuel supply. Once you reach the reactor, you must blast through two regenerating force fields and a shielding wall to start  the meltdown. Your Liberator strike craft is fuelled and ready – prepare to intercept!