Gravitators

Destroy a Stalker while it's still camouflaged.

Master your ratings.

Get your first Crusher Award.

Get your first Fighter Award.

Get your first Lancer Award.

Kill 10 enemies in a row while having 10 hull points or less and without dying.

Get stranded (out of fuel).

Finish a mission without ever using Secondary nor Special Weapons.

Kill 5 enemies with 1 single ammo.

Finish a mission without ever using your shield.

Fail a mission.

Get your first Sparker Award.

Finish 3 missions in Easy difficulty or harder.

Finish 6 missions in Easy difficulty or harder.

Finish 12 missions in Easy difficulty or harder.

Finish 18 missions in Easy difficulty or harder.

Finish mission 10 in any difficulty.

Finish mission 20 in any difficulty.

Finish mission 30 in any difficulty.

Unlock 3 Power Ups.

Unlock 6 Power Ups.

Unlock 9 Power Ups.