Complete the indicated task to unlock the achievement.

Achievement	How to unlock
A Bit of a Challenge	Complete all challenge chapters
All on Offense	Completed story chapter 8 on normal difficulty or harder without building a repair station
Arcadeologist	Reach wave 25 in Arcade mode
Battle Hardened	Complete all story chapters on Hard difficulty
Battle Hardened Hero	Get hero medals from all story chapters on Hard difficulty
Bring Them!	Reach wave 3 in Arcade mode
Elite Defender	Achieve a total score of 10 000 000 or more
First Victory	Complete the first level.
Gorg Buff	Check the credits
Hard Measures	Complete all challenge chapters on Hard difficulty
Little Extra	Finish a level on normal difficulty with 3 x the amount of money needed for the investor medal
Looks & Brains	Meet Sereia.
Master of the Universe	Reach wave 50 in Arcade mode
Mind the Black Hole	Deploy the Black Hole for the first time.
More Merciless than Ming	Complete all challenge chapters on Unstoppable difficulty
Mothership Smasher	Defeat a mothership.
No More Gorg	Complete the last level.
One Satellite Man	Complete a level using only one satellite type.
Radiant, Sir!	Meet the Radiant Beem.
Skeet Shooting	Defeat 1000 aliens.
Soon to be Hero	Achieve hero medals from 5 different story chapters
Space Age Hero	Get all the performance medals in one level in a single try.
Spare No Expense	Spend more than $15,000 in one level.
Stardust	Shoot 10 asteroids
The Researcher	Get 8 upgrade tokens.
Too Easy!	Achieve hero medal in story chapter 3 on normal difficulty or harder without building a single Blast Cannon
Unstoppable	Complete all story chapters on Unstoppable difficulty
Unstoppable Hero	Get hero medals from all story chapters on Unstoppable difficulty
Unstoppable Victory	Complete any level on unstoppable difficulty.