Here is the full list of all 50 Earth Defense Force: Insect Armageddon achievements.
Purchase all weapons for all armors
Survive 500 (total) waves in Survival mode
Get 10000 kills in Survival mode
Collect All Dropped Weapons
Level up all armors completely
Destroy 10000 Gunships
Destroy 100 Carriers
Purchase all available weapons for a single armor
Revive 250 teammates
Kill 10000 Spiders
Beat the game on Inferno
Kill 5000 Ticks
Destroy 100 Anthills/Spider Nests
Kill 25000 Enemies
Level up an armor completely
Kill 10000 Ants
Survive 100 (total) waves in Survival mode.
Get 250 kills with the Lander Turret
Beat the game on Hard
Kill 100 Wasps
Destroy 1000 Gunships
Kill 100 Small Hectors
Get 500 kills with Base Turrets
Destroy 10 Carriers
Beat the game on Normal
Kill a Queen Ant
Kill 5000 enemies
Destroy 10 Anthills/Spider Nests
Get 500 kills with the Tank
Kill 10 Mantises
Kill 10 Bomber Spiders
Destroy 500 buildings
Destroy 500 cars/vehicles
Get 500 kills with the Mech
Get 1000 kills in Survival mode
Kill 10 Wasps
Destroy 100 Gunships
Kill 1000 Ants
Kill a Large Hector
Kill a Mantis
Kill 10 Small Hectors
Destroy 500 world objects
Kill 100 Ticks
Make it through 5 Survival Mode Waves in One Session
Kill 100 Spiders
Kill a Daddy Long Legs
Unlock all armors
Revive a teammate
Incapacitate a teammate
Kill 100 Ants