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