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