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