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