checked-no =>Enter all codes on the Press Start title screen. The screen will flash if a code is entered correctly. * Invulnerability: Press U D A B L R [L] [L] [R] [R] B A. * All Missions: To unlock all the missions in the Flight History computer, press U U [L] [R] D D A A B A. * All Alien Ships in Database: Press [R] [L] A A A B U L D R U A.