10 10 Items No lessEnable a Tower Augmentation Item on 10 Towers.
10 Alien TearsEarn a gold medal on every mission in Story mode.
10 AnnihilatorKill 10,000 aliens.
10 ArsenalBuild 20 towers of any type in one mission.
10 Boot CampFinish all the missions in Chapter 1 in Story Mode.
10 Brothers In ArmsEarn a Bronze (or better) medal in a Coordinated Defense Multiplayer mission.
10 Burn Baby BurnBuild 100 Inferno towers.
10 Close CallSave a core that is less than 10 seconds away from the map's exit point.
10 ConfidentUse the speed up control at 3x for a total of 60 seconds in any mission.
10 Death From AboveUse the Orbital Laser Special Weapon (General Cai).
10 DiversityBuild at least 1 of each tower type in any single mission.
10 EradicatorKill 100 aliens.
10 ExterminatorKill 1000 aliens.
10 Field PromotionEarn a silver (or better) medal.
10 FirebugUsing only Inferno towers, Win any Chapter 4 (or later) mission.
10 First BloodKill 1 alien.
10 Flawless VictoryEarn a Gold Medal.
10 Full DefenseBuild 50 towers of any type in one mission.
10 Full HouseBuild and fully upgrade each tower type in one mission.
10 Full PotentialWin a chapter 4 (or later) mission with level 3 towers only and no selling.
10 Go Team!Earn a Gold medal in a Coordinated Defense Multiplayer Mission.
10 Go To Your HomeUse the Core Teleport special weapon (Professor Taylor).
10 Great Ball of FireBuild 100 Meteor towers.
10 Happy ReturnsRecover a loose core.
10 Head TraumaBuild 100 Concussion towers.
10 Hey! That's mine!Kill an alien carrying a power core.
10 High VoltageBuild 100 Tesla towers.
10 If At First You Don't Succeed, Retry AgainUse the reload checkpoint option five times in a single mission.
10 IndecisiveSell 10 towers or more in a single mission.
10 Kaboom!Build 100 Cannon towers.
10 LeadheadBuild 100 Gun towers.
10 LiquidatorSell 10 towers.
10 Master BuilderUse the command shuttle to move 6 map sections in Mission 6.
10 MinimalistUsing only level 1 towers, Win any Chapter 4 (or later) mission.
10 More PleaseUse the Resource Reinforcement Special Weapon (Professor Briel).
10 No Fast BlastUse the Temporal Cannon Special Weapon (Colonel Rissler).
10 No SaleWin any mission without selling any towers.
10 Not So FastBuild 100 Temporal towers.
10 Now With SprinklesEnable a Tower Augmentation item on any tower.
10 Penny PincherWin a mission with at least 5,000 resources remaining.
10 Pew PewBuild 100 Laser towers.
10 Pumped Up TowersUse the Tower Overcharge Special Weapon (Advisor Zacara).
10 Salvage RightsKill an alien boss creature. (Juggernaut, Rumbler, Turtle, or Crasher)
10 Shell-shockedUsing only Cannon towers, Win any Chapter 4 (or later) mission.
10 Shoot That GuyUse the Precision Targeting Special Weapon (Rear Admiral Phillips).
10 SurplusWin a mission with at least 1,000 resources remaining.
10 The Not-So-Friendly SkiesBuild 100 Missile towers.
10 The Path Most TraveledWin a Gold medal on Mission 19 without using the Command Shuttle.
10 Tower ExpertBuild every tower and every upgrade for each tower.
10 Warning ShotsPlay a DG Fighter Multiplayer mission.
10 What IS that?Inspect 10 aliens.
10 Winning ShotsEarn a Victory in a DG FighterMultiplayer mission.
100 Base DefenderComplete the single player campaign in Story Mode.
100 Master StrategistEarn 100 Gold Medals on any missions.
30 Filthy RichWin a mission with at least 10,000 resources remaining.
30 Gun CrazyUsing only Gun towers, Win any chapter 4 (or later) mission.
30 Planet DefenderEarn a silver medal (or better) on all missions in the Story mode.
30 UntouchableBeat a Chapter 4 mission or higher with zero cores captured.
30 XenocideKill 50,000 aliens.
5 RetryUse the Reload Checkpoint option.
5 Thanks for Playing!Earn a Bronze (or better) medal in a Single Player Mission.
5 Would you like a boost with that?Build 100 Boost towers.
5 Yellow Beats GreenUpgrade a level 1 tower to a level 2 tower.
55 Master Siege BreakerSurvive 100 waves on any Super Grinder challenge mode.
55 Siege BreakerSurvive 100 waves on Grinder challenge mode on any mission.