Eradicator
Kill 100 aliens.
First Blood
Kill 1 alien.
Annihilator
Kill 10,000 aliens.
Exterminator
Kill 1000 aliens.
Xenocide
Kill 50,000 aliens.
Field Promotion
Earn a silver (or better) medal.
Flawless Victory
Earn a Gold Medal.
Salvage Rights
Kill an alien boss creature. (Juggernaut, Rumbler, Turtle, or Crasher)
Liquidator
Sell 10 towers.
Surplus
Win a mission with at least 1,000 resources remaining.
Penny Pincher
Win a mission with at least 5,000 resources remaining.
Filthy Rich
Win a mission with at least 10,000 resources remaining.
Arsenal
Build 20 towers of any type in one mission.
Full Defense
Build 50 towers of any type in one mission.
Indecisive
Sell 10 towers or more in a single mission.
Happy Returns
Recover a loose core.
Hey! That's mine!
Kill an alien carrying a power core.
Yellow Beats Green
Upgrade a level 1 tower to a level 2 tower.
Retry
Use the Reload Checkpoint option.
If At First You Don't Succeed, Retry Again
Use the reload checkpoint option five times in a single mission.
Leadhead
Build 100 Gun towers.
Burn Baby Burn
Build 100 Inferno towers.
Pew Pew
Build 100 Laser towers.
Not So Fast
Build 100 Temporal towers.
Great Ball of Fire
Build 100 Meteor towers.
High Voltage
Build 100 Tesla towers.
Kaboom!
Build 100 Cannon towers.
The Not-So-Friendly Skies
Build 100 Missile towers.
Head Trauma
Build 100 Concussion towers.
Would You Like a Boost With That?
Build 100 Boost towers.
Death From Above
Use the Orbital Laser Special Weapon (General Cai).
No Fast Blast
Use the Temporal Cannon Special Weapon (Colonel Rissler).
More Please
Use the Resource Reinforcement Special Weapon (Professor Briel).
Pumped Up Towers
Use the Tower Overcharge Special Weapon (Advisor Zacara).
Go To Your Home
Use the Core Teleport special weapon (Professor Taylor).
Shoot That Guy
Use the Precision Targeting Special Weapon (Rear Admiral Phillips).
Tower Expert
Build every tower and every upgrade for each tower.
Close Call
Save a core that is less than 10 seconds away from the map's exit point.
No Sale
Win any mission without selling any towers.
Diversity
Build 1 of each tower type in any single mission.
What IS that?
Inspect 10 aliens.
Full House
Build and fully upgrade each tower type in one mission.
Gun Crazy
Using only Gun towers, Win any chapter 4 (or later) mission.
Firebug
Using only Inferno towers, Win any chapter 4 (or later) mission.
Shell-shocked
Using only Cannon towers, Win any chapter 4 (or later) mission.
Minimalist
Using only level 1 towers, Win any Chapter 4 (or later) mission.
Base Defender
Complete the single player campaign in Story Mode.
Planet Defender
Earn a silver medal (or better) on all missions in the Story mode.
Master Strategist
Earn 100 Gold Medals on any missions.
Alien Tears
Earn a gold medal on every mission in Story mode.
Full Potential
Win a chapter 4 (or later) mission with level 3 towers only and no selling.
Now With Sprinkles
Enable a Tower Augmentation item on any tower.
10 Items No Less
Enable a Tower Augmentation Item on 10 Towers.
Master Builder
Use the command shuttle to move 6 map sections in Mission 6.
The Path Most Traveled
Win a Gold medal on mission 19 without using the Command Shuttle.
Confident
Use the speed up control at 3x for a total of 60 seconds in any mission.
Thanks For Playing!
Earn Bronze on a Single Player mission.
Warning Shots
Play a Competitive Multiplayer mission.
Winning Shots
Earn a Victory in a DG Fighter Multiplayer mission.
Brothers in Arms
Earn Bronze in a Co-Op Multiplayer mission.
Go Team!
Earn Gold in a Co-Op Multiplayer mission.
Boot Camp
Finish all the missions in Chapter 1 in Story Mode.
Siege Breaker
Survive 100 waves on Grinder challenge mode on any mission.
Master Siege Breaker
Survive 100 waves on any Super Grinder challenge mode.
Untouchable
Beat a Chapter 4 mission or higher with zero cores captured.