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