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