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