Earn 100 Gold Medals on any missions.
Using only Cannon towers, Win any Chapter 4 (or later) mission.
Enable a Tower Augmentation Item on 10 Towers.
Play a DG Fighter Multiplayer mission.
Earn a Victory in a DG FighterMultiplayer mission.
Earn a Gold medal in a Coordinated Defense Multiplayer Mission.
Use the command shuttle to move 6 map sections in Mission 6.
Kill 50,000 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.
Win a Gold medal on Mission 19 without using the Command Shuttle.
Use the Core Teleport special weapon (Professor Taylor).
Earn a Bronze (or better) medal in a Coordinated Defense Multiplayer mission.
Build 100 Meteor towers.
Build 100 Concussion towers.
Survive 100 waves on Grinder challenge mode on any mission.
Build 100 Missile towers.
Survive 100 waves on any Super Grinder challenge mode.
Build and fully upgrade each tower type in one mission.
Build 100 Temporal towers.
Build every tower and every upgrade for each tower.
Build 100 Tesla towers.
Use the Tower Overcharge Special Weapon (Advisor Zacara).
Build 100 Cannon towers.
Inspect 10 aliens.
Using only level 1 towers, Win any Chapter 4 (or later) mission.
Build 100 Laser towers.
Using only Gun towers, Win any chapter 4 (or later) mission.
Beat a Chapter 4 mission or higher with zero cores captured.
Kill 10,000 aliens.
Use the Temporal Cannon Special Weapon (Colonel Rissler).
Use the Precision Targeting Special Weapon (Rear Admiral Phillips).
Win a chapter 4 (or later) mission with level 3 towers only and no selling.
Using only Inferno towers, Win any Chapter 4 (or later) mission.
Use the reload checkpoint option five times in a single mission.
Sell 10 towers or more in a single mission.
Build 100 Inferno towers.
Win a mission with at least 10,000 resources remaining.
Build 100 Boost towers.
Build at least 1 of each tower type in any single mission.
Sell 10 towers.
Win a mission with at least 5,000 resources remaining.
Build 50 towers of any type in one mission.
Build 100 Gun towers.
Use the Resource Reinforcement Special Weapon (Professor Briel).
Kill an alien boss creature. (Juggernaut, Rumbler, Turtle, or Crasher)
Finish all the missions in Chapter 1 in Story Mode.
Kill 1000 aliens.
Save a core that is less than 10 seconds away from the map's exit point.
Use the speed up control at 3x for a total of 60 seconds in any mission.
Win any mission without selling any towers.
Use the Orbital Laser Special Weapon (General Cai).
Enable a Tower Augmentation item on any tower.
Win a mission with at least 1,000 resources remaining.
Kill 100 aliens.
Earn a silver (or better) medal.
Earn a Gold Medal.
Recover a loose core.
Kill an alien carrying a power core.
Build 20 towers of any type in one mission.
Kill 1 alien.
Use the Reload Checkpoint option.
Earn a Bronze (or better) medal in a Single Player Mission.
Upgrade a level 1 tower to a level 2 tower.
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