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