Here is the full list of all 50 EARTH DEFENSE FORCE 4.1 WINGDIVER THE SHOOTER achievements.
Clear Mission 1 on Normal Difficulty
Obtain 150 Armor
Get a 2000 combo
Clear Mission 4 on Easy Difficulty
Clear Mission 3 on Easy Difficulty
Clear Mission 2 on Easy Difficulty
Obtain 10% of all weapons
Get a 1000 combo
Clear Mission 1 on Easy Difficulty
Clear Mission 5 on Easy Difficult
Clear Mission 6 on Easy Difficulty
Clear Mission 2 on Normal Difficulty
Clear Mission 3 on Normal Difficulty
Clear Mission 4 on Normal Difficulty
Clear Mission 5 on Normal Difficulty
Clear Mission 6 on Normal Difficulty
Clear Mission 1 on Hard Difficulty
Clear Mission 2 on Hard Difficulty
Clear Mission 3 on Hard Difficulty
Clear Mission 4 on Hard Difficulty
Clear Mission 5 on Hard Difficulty
Clear Mission 6 on Hard Difficulty
Clear Mission 1 on Hardest Difficulty
Clear Mission 2 on Hardest Difficulty
Clear Mission 3 on Hardest Difficulty
Clear Mission 4 on Hardest Difficulty
Clear Mission 5 on Hardest Difficulty
Clear Mission 6 on Hardest Difficulty
Clear Mission 1 on Inferno Difficulty
Clear Mission 2 on Inferno Difficulty
Clear Mission 3 on Inferno Difficulty
Clear Mission 4 on Inferno Difficulty
Clear Mission 5 on Inferno Difficulty
Clear Mission 6 on Inferno Difficulty
Clear all 6 missions on Easy Difficulty
Clear all 6 missions on Normal Difficulty
Clear all 6 missions on Hard Difficulty
Clear all 6 missions on Hardest Difficulty
Clear all 6 missions on Inferno Difficulty
Clear Extra Mission 1
Clear Extra Mission 2
Clear Extra Mission 3
Clear Extra Mission 4
Clear Extra Mission 5
Clear Extra Mission 6
Clear all 6 Extra Missions
Obtain 200 Armor
Obtain 50% of all weapons
Obtain 80% of all weapons
Obtain 100% of all weapons