Auto Gyro:
To unlock the Auto Gyro, complete all the levels in Sky Canvas more with more than 90 points
Corsair:
To unlock the Corsair, in Adventure mode, recieve enough acrobatic poitns to have 10 of your missions grades marked with circles.
Gold UFO:
To unlock the Gold UFO, In Target Mode complete all the levels with a gold rank
Me-262:
To unlock the Me-262, Complete the adventure mode
Silver UFO:
To unlock the Silver UFO, in Adventure mode, complete all the levels with an A rank
Stealth Fighter:
To unlock the Stealth Fighter, In Adventure mode, complete all the levels with a total time less than 10 mintues.
Custom parts:
Complete all adventure mode levels with at B or better to unlock custom parts
Target Mode Medal Unlocking
Target Mode Medals may be exchanged for features:
Radio: 4 Gold Medals
Music Tracks (12 tracks total): one silver Medal per track
Special Radar Upgrade: 2 Gold Medals
New Emblems for Customize Aircraft Mode: 2 Silver Medals
Unlimited Boost for Jets: 2 Gold Medals
Swordfish into Tri-Plane:
Land at the Mid-Air Rendevous alternate landing strip in the adventure mode to find a wing that can be attached to the Swordfish aircraft to convert it into a triplane. Unlocking the Special Radar in the Target Mode makes it much easier to find the landing strip
Shinden Part Locations:
The 4 parts to the Shinden are hidden through out the game on alternate landing strips. To recieve the parts, you must land on the strips. Unlocking the Special Radar in the Target Mode makes it much easier to find the landing strips.
Right Wing:
The Adventure Begins level alternate landing strip.
Left Wing:
The Labyrinth level alternate landing strip.
Fuselage:
The Towers Of Terror alternate landing strip.
Jet Engine:
The Great Divide level alternate landing strip.
All Aircraft + UFOs:
Press Square, Circle, L1, R2, Select at aircraft Select screen
All Missions:
Press X, Triangle, R1, R2 at mission Select screen
Get Pontoons:
Beat ''Stromy Sea'' level in Adventure mode.
Get Custom Parts:
Beat an adventure mode level with at least a B rank and you are given the choice to add another part to the plane that you beat the level with.
Unlock Extra Planes:
ME-262 - Beat Adventure Mode one time.
Stealth Jet - Beat one round of Target Mode in less than 10 minutes.
Shinden-Kai - Collect the jet engine after your collect the parts of the Shinden.
Shinden - Collect the part in Advenutre Mode by landing on alternate runways.
Corsair - Get 6,000+ acrobatic points on any 10 missions in Adventure Mode.
Autogyro - Get 90+ points on all Sky Canvas levels.
Silver UFO - Get A's on all Adventure Mode missions.
Gold UFO - Get all Gold Medals on one round of Target Mode.
More Unlockables:
Score points in Target mode stages to earn medals. These medals can be used to buy Hangar items.
Music tracks (12 total) - Get 1 silver medal for one track
Special Radar - Get 2 gold medals
Unlimited Boost for Jets - Get 2 gold medals
Extra Emblems - Get 2 silver medals
Radio - Get 4 gold medals