Play a DG Fighter Multiplayer mission.
Earn a Victory in a DG FighterMultiplayer mission.
Earn a Gold medal in a Coordinated Defense Multiplayer Mission.
Earn a Bronze (or better) medal in a Coordinated Defense Multiplayer mission.
Build 100 Tesla towers.
Build 100 Boost towers.
Build 100 Meteor towers.
Build 100 Concussion towers.
Build 100 Temporal towers.
Build 100 Laser towers.
Build 100 Inferno towers.
Earn 100 Gold Medals on any missions.
Kill 50,000 aliens.
Enable a Tower Augmentation Item on 10 Towers.
Use the Tower Overcharge Special Weapon (Advisor Zacara).
Earn a gold medal on every mission in Story mode.
Use the Core Teleport special weapon (Professor Taylor).
Earn a silver medal (or better) on all missions in the Story mode.
Complete the single player campaign in Story Mode.
Using only Inferno towers, Win any Chapter 4 (or later) mission.
Win a Gold medal on Mission 19 without using the Command Shuttle.
Using only Cannon towers, Win any Chapter 4 (or later) mission.
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.
Kill 10,000 aliens.
Use the Precision Targeting Special Weapon (Rear Admiral Phillips).
Beat a Chapter 4 mission or higher with zero cores captured.
Build 100 Cannon towers.
Use the Temporal Cannon Special Weapon (Colonel Rissler).
Enable a Tower Augmentation item on any tower.
Build 50 towers of any type in one mission.
Use the command shuttle to move 6 map sections in Mission 6.
Use the Resource Reinforcement Special Weapon (Professor Briel).
Build 100 Gun towers.
Kill an alien boss creature. (Juggernaut, Rumbler, Turtle, or Crasher)
Survive 100 waves on any Super Grinder challenge mode.
Survive 100 waves on Grinder challenge mode on any mission.
Finish all the missions in Chapter 1 in Story Mode.
Build at least 1 of each tower type in any single mission.
Kill 1000 aliens.
Build and fully upgrade each tower type in one mission.
Build every tower and every upgrade for each tower.
Sell 10 towers or more in a single mission.
Earn a silver (or better) medal.
Win a mission with at least 10,000 resources remaining.
Earn a Gold Medal.
Sell 10 towers.
Win a mission with at least 5,000 resources remaining.
Use the Orbital Laser Special Weapon (General Cai).
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.
Kill 100 aliens.
Win a mission with at least 1,000 resources remaining.
Use the speed up control at 3x for a total of 60 seconds in any mission.
Kill 1 alien.
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.
Earn a Bronze (or better) medal in a Single Player Mission.
Inspect 10 aliens.
Upgrade a level 1 tower to a level 2 tower.
