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