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.
Build at least 1 of each tower type in any single mission.
Build and fully upgrade each tower type in one mission.
Build 100 Laser towers.
Build every tower and every upgrade for each tower.
Build 100 Boost towers.
Use the Core Teleport special weapon (Professor Taylor).
Build 100 Concussion towers.
Kill 10,000 aliens.
Win a chapter 4 (or later) mission with level 3 towers only and no selling.
Use the reload checkpoint option five times in a single mission.
Sell 10 towers.
Use the Reload Checkpoint option.
Use the Precision Targeting Special Weapon (Rear Admiral Phillips).
Beat a Chapter 4 mission or higher with zero cores captured.
Use the Temporal Cannon Special Weapon (Colonel Rissler).
Build 100 Cannon towers.
Enable a Tower Augmentation item on any tower.
Inspect 10 aliens.
Build 50 towers of any type in one mission.
Use the Tower Overcharge Special Weapon (Advisor Zacara).
Kill an alien boss creature. (Juggernaut, Rumbler, Turtle, or Crasher)
Build 100 Gun towers.
Use the Resource Reinforcement Special Weapon (Professor Briel).
Win a mission with at least 5,000 resources remaining.
Kill 1000 aliens.
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.
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.
Recover a loose core.
Kill an alien carrying a power core.
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.
Win a mission with at least 10,000 resources remaining.
Using only Inferno towers, Win any Chapter 4 (or later) mission.
Earn a Gold medal in a Coordinated Defense Multiplayer Mission.
Build 100 Meteor towers.
Using only Gun towers, Win any chapter 4 (or later) mission.
Build 100 Tesla towers.
Sell 10 towers or more in a single mission.
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.
Build 100 Temporal towers.
Using only Cannon towers, Win any Chapter 4 (or later) mission.
Enable a Tower Augmentation Item on 10 Towers.
Build 100 Missile towers.
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.
Earn a Bronze (or better) medal in a Coordinated Defense Multiplayer mission.
Build 100 Inferno towers.
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