Here is the full list of all 65 Defense Grid 2 achievements.
Earn 100 Gold Medals on any missions.
Kill 50,000 aliens.
Earn a Victory in a DG Fighter Multiplayer mission.
Play a Competitive Multiplayer mission.
Build 100 Temporal towers.
Build 100 Concussion towers.
Build 100 Meteor towers.
Enable a Tower Augmentation Item on 10 Towers.
Build 100 Inferno towers.
Build 100 Laser towers.
Use the command shuttle to move 6 map sections in Mission 6.
Survive 100 waves on any Super Grinder challenge mode.
Survive 100 waves on Grinder challenge mode on any mission.
Build 100 Tesla 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.
Kill 10,000 aliens.
Use the Core Teleport special weapon (Professor Taylor).
Win a Gold medal on mission 19 without using the Command Shuttle.
Use the Precision Targeting Special Weapon (Rear Admiral Phillips).
Using only Gun towers, Win any chapter 4 (or later) mission.
Win a chapter 4 (or later) mission with level 3 towers only and no selling.
Build 100 Cannon towers.
Using only Cannon towers, Win any chapter 4 (or later) mission.
Using only Inferno towers, Win any chapter 4 (or later) mission.
Beat a Chapter 4 mission or higher with zero cores captured.
Using only level 1 towers, Win any Chapter 4 (or later) mission.
Build 100 Missile towers.
Build every tower and every upgrade for each tower.
Build and fully upgrade each tower type in one mission.
Build 100 Gun towers.
Use the Temporal Cannon Special Weapon (Colonel Rissler).
Win a mission with at least 10,000 resources remaining.
Sell 10 towers or more in a single mission.
Use the Reload Checkpoint option.
Use the reload checkpoint option five times in a single mission.
Sell 10 towers.
Kill an alien boss creature. (Juggernaut, Rumbler, Turtle, or Crasher)
Build 50 towers of any type in one mission.
Finish all the missions in Chapter 1 in Story Mode.
Build 100 Boost towers.
Build 1 of each tower type in any single mission.
Win a mission with at least 5,000 resources remaining.
Use the Resource Reinforcement Special Weapon (Professor Briel).
Inspect 10 aliens.
Use the Tower Overcharge Special Weapon (Advisor Zacara).
Kill 1000 aliens.
Earn a Gold Medal.
Earn a silver (or better) medal.
Use the speed up control at 3x for a total of 60 seconds in any mission.
Earn Bronze on a Single Player 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.
Win any mission without selling any towers.
Enable a Tower Augmentation item on any tower.
Kill 100 aliens.
Kill 1 alien.
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.
Use the Orbital Laser Special Weapon (General Cai).
Earn Bronze in a Co-Op Multiplayer mission.
Earn Gold in a Co-Op Multiplayer mission.