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