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