Gravity Crash™

Kill 255 gun or missile turrets

Rescue 50 stranded crewmen

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

Let a homing missile chase you until it runs out of fuel

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

Create and publish a level then have it rated by 5 users

In manual shield mode, save yourself with only 5% of the shield remaining

Complete all training lessons

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

Gain a score of 1,048,576

Finish the single player campaign game