Pause the game and press Right, Down, Left(2), Down, Right(2), Down, Left, X, Square, Circle. Pause the game and press Right, Down, Left(2), Down, Right(2), Down, Left, X, Square, Triangle. Alternatively, pause the game and press Circle(3), Up, Circle, Square, R1, Circle(3). Now the entire battlefield will be displayed. Keep the buttons pressed until the mission briefing begins.
While the game is loading, hold R1 + R2 + L1 + L2 + Circle + Square. Unpause the game and you will see both air-strike and ion-cannon together. Then press Right, Down, Left(2), Down, Right(2), Down, Left, X, Square, then press Triangle + Circle. One way to make both air-strike and ion-cannon together with just one method, press Start to pause the game.
