Here is the full list of all 65 Defense Grid 2 achievements.
Use the Reload Checkpoint option.
Use the reload checkpoint option five times in a single mission.
Earn 100 Gold Medals on any missions.
Kill 50,000 aliens.
Using only level 1 towers, Win any Chapter 4 (or later) mission.
Using only Cannon towers, Win any chapter 4 (or later) mission.
Using only Inferno towers, Win any chapter 4 (or later) mission.
Using only Gun towers, Win any chapter 4 (or later) mission.
Earn a gold medal on every mission in Story mode.
Complete the single player campaign in Story Mode.
Earn a silver medal (or better) on all missions in the Story mode.
Win a Gold medal on mission 19 without using the Command Shuttle.
Build 100 Concussion towers.
Win a chapter 4 (or later) mission with level 3 towers only and no selling.
Use the Precision Targeting Special Weapon (Rear Admiral Phillips).
Build 100 Laser towers.
Build 100 Meteor towers.
Build 100 Inferno towers.
Use the command shuttle to move 6 map sections in Mission 6.
Kill an alien boss creature. (Juggernaut, Rumbler, Turtle, or Crasher)
Finish all the missions in Chapter 1 in Story Mode.
Sell 10 towers.
Earn a Gold Medal.
Use the speed up control at 3x for a total of 60 seconds in any mission.
Earn a silver (or better) medal.
Survive 100 waves on any Super Grinder challenge mode.
Beat a Chapter 4 mission or higher with zero cores captured.
Build 100 Temporal towers.
Build 100 Cannon towers.
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.
Enable a Tower Augmentation Item on 10 Towers.
Survive 100 waves on Grinder challenge mode on any mission.
Kill 10,000 aliens.
Earn a Victory in a DG Fighter Multiplayer mission.
Play a Competitive Multiplayer mission.
Use the Tower Overcharge Special Weapon (Advisor Zacara).
Use the Core Teleport special weapon (Professor Taylor).
Build 100 Missile towers.
Use the Temporal Cannon Special Weapon (Colonel Rissler).
Build 100 Tesla towers.
Win a mission with at least 10,000 resources remaining.
Build 50 towers of any type in one mission.
Build 100 Gun towers.
Win any mission without selling any towers.
Build 100 Boost towers.
Use the Resource Reinforcement Special Weapon (Professor Briel).
Win a mission with at least 5,000 resources remaining.
Earn Bronze in a Co-Op Multiplayer mission.
Earn Gold in a Co-Op Multiplayer mission.
Enable a Tower Augmentation item on any tower.
Kill 1000 aliens.
Use the Orbital Laser Special Weapon (General Cai).
Win a mission with at least 1,000 resources remaining.
Build 20 towers of any type in one mission.
Sell 10 towers or more in a single mission.
Recover a loose core.
Kill an alien carrying a power core.
Save a core that is less than 10 seconds away from the map's exit point.
Inspect 10 aliens.
Kill 100 aliens.
Upgrade a level 1 tower to a level 2 tower.
Earn Bronze on a Single Player mission.
Kill 1 alien.