Completed the first level
Equipped a special weapon for the first time.
Equipped rockets for the first time.
Equipped a ship with all types of weapons.
Unlocked the Red Siren ship.
Fully upgraded a ship.
Spent over 1000000 credits.
Used 5 or more powerups within a single mission.
Used over a 100 powerups.
Finished all missions.
Finished all missions with a 3 star rating.
Killed an enemy jet with bombs.
All ships acquired, and fully upgraded.
Unlocked all achievements.
Finished a mission in less then 15 seconds.
Finished a mission only using bombs.
Finished a mission without taking any damage.
Destroyed over 400 tanks.
Shot down over 200 jets.
Bought a machine gun.
Equipped bombs for the first time.
