Here is the full list of all 51 EARTH DEFENSE FORCE 4.1 The Shadow of New Despair achievements.
Destroyed 5000 flying drones.
Defeated 40 king spiders.
Cleared all stages on Hard difficulty as a Ranger.
Destroyed 6 motherships.
Destroyed 2000 flying vehicles.
Defeated 12,000 spider-type bugs.
Cleared all stages on Normal difficulty as a Fencer.
Cleared all stages on Normal difficulty as an Air Raider.
Defeated 24 death queens.
Defeated 4000 flying-type bugs.
Defeated 200 Deroys.
Destroyed 900 Hectors.
Destroyed 6 flying-type bug nests.
Defeated 24 queens.
Defeated 120 shield bearers.
Cleared all stages on Normal difficulty as a Wing Diver.
Defeated 20,000 ant-type bugs.
Defeated 2400 Dragons.
Destroyed 200 underground tunnel exits.
Defeated 360 Retiarii.
Air Raider's health has reached 1000.
Obtained 50% of all available weapons.
Rescued 50 other players in co-op play.
Fencer's health has reached 1250.
Wing Diver's health has reached 550.
Cleared all stages on Normal difficulty as a Ranger.
Ranger's health has reached 1000.
Healed another player in co-op play.
Rescued 5 other players in co-op play.
Reached a height of 200 meters.
Obtained 10% of all available weapons.
Cleared all stages on Hardest difficulty as a Ranger.
Cleared all stages on Inferno difficulty as a Ranger.
Cleared all stages on Hard difficulty as a Wing Diver.
Cleared all stages on Hardest difficulty as a Wing Diver.
Cleared all stages on Inferno difficulty as a Wing Diver.
Cleared all stages on Hard difficulty as an Air Raider.
Cleared all stages on Hardest difficulty as an Air Raider.
Cleared all stages on Inferno difficulty as an Air Raider.
Cleared all stages on Hard difficulty as a Fencer.
Cleared all stages on Hardest difficulty as a Fencer.
Cleared all stages on Inferno difficulty as a Fencer.
Obtained all available weapons.
Destroyed 500 carriers.
Destroyed 12 quadruped fortresses.
Destroyed 150 red drones.
Destroyed 200 large transport ships.
Defeated 20 Greater Wild Dragons.
Destroyed 20 Argos.
Destroyed 30 Erginuses.
Destroyed 6 Brains.