Pilot License
Not unlocked yetComplete the tutorial (single player, normal difficulty or harder).
Turret Commander
Not unlocked yetTurret Defense: Get to round 5 (single or multiplayer).
Turret Admiral
Not unlocked yetTurret Defense: Get to round 13 (single or multiplayer).
Big Saver
Not unlocked yetTurret Defense: Have 750 money on hand (single or multiplayer).
Imminent Death
Not unlocked yetTurret Defense: Have all boss types in play (single or multiplayer).
Pawn Shop
Not unlocked yetTurret Defense: Sell 20 turrets (single or multiplayer).
Formidable Defense
Not unlocked yetTurret Defense: Have 40 turrets in play (single or multiplayer).
Minimalist
Not unlocked yetTurret Defense: Beat all boss types without upgrading (single or multiplayer).
Uneasy Defender
Not unlocked yetTurret Defense: Lose 200% health on the planet (single or multiplayer).