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