Complete all training lessons
Kill 255 gun or missile turrets
???
Create and publish a level then have it rated by 5 users
Find 5 user created levels you like, and rate the creators
Collect all artifact pieces
Find all gems in every level
Beat the recommended time on 10 levels
Have rear, side and 3-way fire simultaneously
Finish the single player campaign game
Defeat any boss
Complete 'Norova' level without refuelling or dying
Refuel your ship after the fuel depleted warning message is displayed
Complete 'Vectora' level without firing a single shot
Unlock any secret level
Activate every node in the game, including those in secret levels
Collect a total of 10 purple gems across different levels
