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