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