During the intro scenes (when you see the jets fly) enter the following code: Up (D-Pad), C-Down, left, C-Right, down, C-Up, right, C-left, L, R, Z. You should now hear a chime to tell you the code worked. Now select Main Game and pick the mission you want -- from Tokyo to Space.

When you start out in the cave, you start to go down. At the bottom there is a big open area. You have to get low and do half a loop, then twist yourself so you're not upside down. You might have to point the nose down a little and then you should see a grate. Fly through it without hitting it and you should see a little hole. Fly in it and your inside like a machine. Also before you go in the grate you can pull up and go to where you started. Fly out of the cave and there is AAA waiting you to blast you out of the sky!

Find and complete all 3 bonus missions in the game and Spanky, a new pilot, will be enabled.

On the title screen, press: C-Left, C-Down, C-Right, C-Up, C-Left, C-Right, C-Down

For each normal mission you complete, a new plane will be added to the deathmatch plane select menu. If you have Mao Mao and Spanky, that'll make 12 planes.

There is a secret stage after you win the Ice Cave stage. It waits for a player who can complete all three bonus stages and all seven regular stages.

The third bonus stage is played after Fortress if you have already won the first two bonus stages.

To reach the second bonus stage you will need to complete Tokyo, Pacific Ocean, and Air Battle very quickly. If it's sunset when you reach the Desert stage you're already too late to save the shuttle.

To reach the first bonus you must complete Tokyo and the Pacific Ocean stages with a very high score.

On the title screen, (full screen logo, and "Press Start") NOT the main menu screen, press the following buttons: C-Left, C-Down, C-Right, C-Up, C-Left, C-Right, C-Down. Don't be discouraged when you don't hear a sound or see something new, because nothing will happen. Go to any plane select screen, and on the far left, you will see a new F-15 plane with a girl pilot.

Press R at the plane select screen. (Only works in Main Game and Boss attack)To select the alternate color in Death Match, Hold the R button while selecting your plane. (Only works for the four original planes.)