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