Here is the full list of all 39 IS Defense achievements.
Fire 1000 rockets
Finish desert level
Survive 20 minutes on Saint Tropez
Finish the game
Finish Saint Tropez level
Survive 20 minutes on harbor
Survive 10 minutes on harbor
Finish harbor level
Survive 10 minutes on Saint Tropez
Destroy 30 landing crafts
KIll 30 000 terrorists
Call infantry support 100 times
Get all upgrades
Max the rockets skill branch
Call the air strike support 40 times
Survive 20 minutes on the desert
Max the support skill branch
Max the machine gun branch
Destroy planes on the desert level
Max the player skill branch
Survive 10 minutes on the desert
Call the cargo support 100 times
Destroy 1000 vehicles
Call artillery support 50 times
Kill 10 000 terrorists
Survive 20 minutes on the beach
Call the helicopter support 30 times
Destroy 250 Hummers
Destroy 500 vehicles
Survive 10 minutes on the beach
Finish beach level
Destroy 200 vehicles
Destroy the Scooby mobile
Destroy 100 pontoons
Kill 3 000 terrorists
Deliver 100 headshots
Let 100 pontoons land on the shore
Destroy 100 suiciders before they detonate themselves
Destroy the fishing boat on beach level