A Bit of a Challenge
Not unlocked yetComplete all challenge chapters
All on Offense
Not unlocked yetCompleted story chapter 8 on normal difficulty or harder without building a repair station
Arcadeologist
Not unlocked yetReach wave 25 in Arcade mode
Battle Hardened
Not unlocked yetComplete all story chapters on Hard difficulty
Battle Hardened Hero
Not unlocked yetGet hero medals from all story chapters on Hard difficulty
Beamer
Not unlocked yetKill 50 enemies with beam link rays
Bring Them!
Not unlocked yetReach wave 3 in Arcade mode
Unstoppable Victory
Not unlocked yetComplete any level on unstoppable difficulty.
Elite Defender
Not unlocked yetAchieve a total score of 10 000 000 or more
First Victory
Not unlocked yetComplete the first level.
Gorg Buff
Not unlocked yetCheck the credits
Hard Measures
Not unlocked yetComplete all challenge chapters on Hard difficulty
Little Extra
Not unlocked yetFinish a level on normal difficulty with 3 x the amount of money needed for the investor medal
Looks & Brains
Not unlocked yetMeet Sereia.
Master of the Universe
Not unlocked yetReach wave 50 in Arcade mode
Mind the Black Hole
Not unlocked yetDeploy the Black Hole for the first time.
More Merciless than Ming
Not unlocked yetComplete all challenge chapters on Unstoppable difficulty
Mothership Smasher
Not unlocked yetDefeat a mothership.
No More Gorg
Not unlocked yetComplete the last level.
One Satellite Man
Not unlocked yetComplete a level using only one satellite type.
Radiant, Sir!
Not unlocked yetMeet the Radiant Beem.
Skeet Shooting
Not unlocked yetDefeat 1000 aliens.
Soon to be Hero
Not unlocked yetAchieve hero medals from 5 different story chapters
Space Age Hero
Not unlocked yetGet all the performance medals in one level in a single try.