Here is the full list of all 65 Defense Grid 2 achievements.
Enable a Tower Augmentation Item on 10 Towers.
Earn 100 Gold Medals on any missions.
Kill 50,000 aliens.
Build 100 Temporal towers.
Build 100 Meteor towers.
Build 100 Tesla towers.
Build 100 Cannon towers.
Using only Cannon towers, Win any chapter 4 (or later) mission.
Using only level 1 towers, Win any Chapter 4 (or later) mission.
Using only Inferno towers, Win any chapter 4 (or later) mission.
Build 100 Concussion towers.
Complete the single player campaign in Story Mode.
Earn a silver medal (or better) on all missions in the Story mode.
Earn a gold medal on every mission in Story mode.
Win a Gold medal on mission 19 without using the Command Shuttle.
Build 100 Missile towers.
Use the Core Teleport special weapon (Professor Taylor).
Build every tower and every upgrade for each tower.
Build and fully upgrade each tower type in one mission.
Build 100 Laser towers.
Using only Gun towers, Win any chapter 4 (or later) mission.
Use the Precision Targeting Special Weapon (Rear Admiral Phillips).
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.
Use the Temporal Cannon Special Weapon (Colonel Rissler).
Use the command shuttle to move 6 map sections in Mission 6.
Use the Resource Reinforcement Special Weapon (Professor Briel).
Build 1 of each tower type in any single mission.
Kill an alien boss creature. (Juggernaut, Rumbler, Turtle, or Crasher)
Build 100 Boost towers.
Survive 100 waves on any Super Grinder challenge mode.
Kill 10,000 aliens.
Build 50 towers of any type in one mission.
Build 100 Inferno towers.
Survive 100 waves on Grinder challenge mode on any mission.
Use the Tower Overcharge Special Weapon (Advisor Zacara).
Finish all the missions in Chapter 1 in Story Mode.
Build 100 Gun towers.
Enable a Tower Augmentation item on any tower.
Earn Bronze in a Co-Op Multiplayer mission.
Earn Gold in a Co-Op Multiplayer mission.
Play a Competitive Multiplayer mission.
Earn a Victory in a DG Fighter Multiplayer mission.
Inspect 10 aliens.
Save a core that is less than 10 seconds away from the map's exit point.
Kill 1000 aliens.
Build 20 towers of any type in one mission.
Sell 10 towers or more in a single mission.
Use the Orbital Laser Special Weapon (General Cai).
Sell 10 towers.
Kill 100 aliens.
Win a mission with at least 5,000 resources remaining.
Win a mission with at least 10,000 resources remaining.
Use the Reload Checkpoint option.
Use the reload checkpoint option five times in a single mission.
Use the speed up control at 3x for a total of 60 seconds in any mission.
Kill 1 alien.
Earn a silver (or better) medal.
Earn a Gold Medal.
Win a mission with at least 1,000 resources remaining.
Recover a loose core.
Kill an alien carrying a power core.
Upgrade a level 1 tower to a level 2 tower.
Win any mission without selling any towers.
Earn Bronze on a Single Player mission.