Enable a Tower Augmentation Item on 10 Towers.
Earn 100 Gold Medals on any missions.
Kill 50,000 aliens.
Earn a Victory in a DG FighterMultiplayer mission.
Play a DG Fighter Multiplayer mission.
Build 100 Tesla towers.
Build 100 Laser towers.
Survive 100 waves on any Super Grinder challenge mode.
Build 100 Inferno towers.
Build 100 Meteor towers.
Using only Cannon towers, Win any Chapter 4 (or later) mission.
Using only level 1 towers, Win any Chapter 4 (or later) mission.
Enable a Tower Augmentation item on any tower.
Using only Inferno towers, Win any Chapter 4 (or later) mission.
Earn a Gold medal in a Coordinated Defense Multiplayer Mission.
Earn a Bronze (or better) medal in a Coordinated Defense Multiplayer mission.
Earn a gold medal on every mission in Story mode.
Build 100 Concussion towers.
Build 100 Temporal towers.
Earn a silver medal (or better) on all missions in the Story mode.
Complete the single player campaign in Story Mode.
Build 100 Missile towers.
Win a Gold medal on Mission 19 without using the Command Shuttle.
Use the Core Teleport special weapon (Professor Taylor).
Kill 10,000 aliens.
Build 100 Cannon towers.
Build 50 towers of any type in one mission.
Build 100 Gun towers.
Build 100 Boost towers.
Using only Gun towers, Win any chapter 4 (or later) mission.
Win a chapter 4 (or later) mission with level 3 towers only and no selling.
Use the Precision Targeting Special Weapon (Rear Admiral Phillips).
Beat a Chapter 4 mission or higher with zero cores captured.
Build at least 1 of each tower type in any single mission.
Build and fully upgrade each tower type in one mission.
Build every tower and every upgrade for each tower.
Use the Temporal Cannon Special Weapon (Colonel Rissler).
Win a mission with at least 10,000 resources remaining.
Sell 10 towers or more in a single mission.
Sell 10 towers.
Survive 100 waves on Grinder challenge mode on any mission.
Use the command shuttle to move 6 map sections in Mission 6.
Build 20 towers of any type in one mission.
Kill an alien boss creature. (Juggernaut, Rumbler, Turtle, or Crasher)
Use the Resource Reinforcement Special Weapon (Professor Briel).
Kill 1000 aliens.
Use the Tower Overcharge Special Weapon (Advisor Zacara).
Finish all the missions in Chapter 1 in Story Mode.
Recover a loose core.
Kill an alien carrying a power core.
Save a core that is less than 10 seconds away from the map's exit point.
Use the Orbital Laser Special Weapon (General Cai).
Kill 100 aliens.
Earn a Gold Medal.
Win a mission with at least 5,000 resources remaining.
Inspect 10 aliens.
Use the speed up control at 3x for a total of 60 seconds in any mission.
Earn a silver (or better) medal.
Kill 1 alien.
Use the reload checkpoint option five times in a single mission.
Win any mission without selling any towers.
Use the Reload Checkpoint option.
Win a mission with at least 1,000 resources remaining.
Earn a Bronze (or better) medal in a Single Player Mission.
Upgrade a level 1 tower to a level 2 tower.
