Secret Stage
By: Duros Bith 
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. 

Goliath Defense
By: Duros Bith 
The third bonus stage is played after Fortress if you have already won the first two bonus stages. 

Shuttle Defense
By: Duros Bith 
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. 

Air Docking
By: Duros Bith 
To reach the first bonus you must complete Tokyo and the Pacific Ocean stages with a very high score. 

Extra Pilot
By: Drokin (dspat@discover.net) 
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. 

Change Colors
Press R at the plane select screen. (NOTE: This trick only works in Main Game and Boss attack) 

Second Paint Job for the Planes
By: Duros Bith via N64cc 
Press R at the plane select screen. (Only works in Main Game and Boss attack)