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