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