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