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