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