Enable a Tower Augmentation Item on 10 Towers.
Earn 100 Gold Medals on any missions.
Kill 50,000 aliens.
Use the Core Teleport special weapon (Professor Taylor).
Use the Precision Targeting Special Weapon (Rear Admiral Phillips).
Build 100 Concussion towers.
Build 100 Tesla towers.
Build 100 Temporal towers.
Build 100 Meteor towers.
Build 100 Laser towers.
Build 100 Inferno towers.
Build 100 Gun towers.
Survive 100 waves on any Super Grinder challenge mode.
Survive 100 waves on Grinder challenge mode on any mission.
Earn a Gold medal in a Coordinated Defense Multiplayer Mission.
Earn a Bronze (or better) medal in a Coordinated Defense Multiplayer mission.
Play a DG Fighter Multiplayer mission.
Earn a Victory in a DG FighterMultiplayer mission.
Using only level 1 towers, Win any Chapter 4 (or later) mission.
Build 100 Cannon towers.
Using only Cannon towers, Win any Chapter 4 (or later) mission.
Using only Inferno towers, Win any Chapter 4 (or later) mission.
Kill 10,000 aliens.
Earn a gold medal on every mission in Story mode.
Earn a silver medal (or better) on all missions in the Story mode.
Complete the single player campaign in Story Mode.
Build 100 Missile towers.
Win a Gold medal on Mission 19 without using the Command Shuttle.
Build 50 towers of any type in one mission.
Sell 10 towers or more in a single mission.
Sell 10 towers.
Build at least 1 of each tower type in any single mission.
Build and fully upgrade each tower type in one mission.
Build every tower and every upgrade for each tower.
Build 100 Boost towers.
Using only Gun towers, Win any chapter 4 (or later) mission.
Win a chapter 4 (or later) mission with level 3 towers only and no selling.
Beat a Chapter 4 mission or higher with zero cores captured.
Save a core that is less than 10 seconds away from the map's exit point.
Win a mission with at least 10,000 resources remaining.
Use the Temporal Cannon Special Weapon (Colonel Rissler).
Use the command shuttle to move 6 map sections in Mission 6.
Build 20 towers of any type in one mission.
Kill an alien boss creature. (Juggernaut, Rumbler, Turtle, or Crasher)
Use the Resource Reinforcement Special Weapon (Professor Briel).
Enable a Tower Augmentation item on any tower.
Kill 1000 aliens.
Use the Tower Overcharge Special Weapon (Advisor Zacara).
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.
Use the Orbital Laser Special Weapon (General Cai).
Kill 100 aliens.
Recover a loose core.
Kill an alien carrying a power core.
Win a mission with at least 5,000 resources remaining.
Earn a silver (or better) medal.
Kill 1 alien.
Earn a Gold Medal.
Use the reload checkpoint option five times in a single 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.
Inspect 10 aliens.
Upgrade a level 1 tower to a level 2 tower.