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