Kill an enemy by leading it to the laser cannon.
Reach 10000 score in Arcade.
Kill 25 enemies while under the effect of Overload.
Kill 25 enemies with a Railgun shot.
Kill 200 enemies with a Spreadshot.
Kill 125 enemies with Homing Missiles.
Kill 50 enemies disabled by the EMP.
Shoot down 300 UFOs.
Destroy 150 basic turrets.
Push 40 buttons.
Retrieve 100 rescue pods.
Exit the reactor level with less than 1s before the reactor explodes.
Destroy 150 asteroids in the solar system.
Complete the first solar system without losing a life.
Crash into the star without any fuel.
Complete all singleplayer missions.
Complete all 6 types of planets.
Complete all 6 planets in 4 solar systems.
Use all power-ups.