@puppylols33 .... Well. I tried your srategy and it didn't work. I suggest trying to get a War Sanctum. If multiplayer set your government to Monarchy. Use a Special Operations to get some of the things so you can get practically invincible units that you only need 2 of to take out an enemy. There is an Unstoppable plan. Because the invincible units are the Saint Helicopters. Your plan is bad. If mine doesn't work i would like to hear yours.
What in do for the achievement, I selected "Nightmare" No "Devils" "Friendly Fire" and i simply spam charges around. I run around the map being a Minecraft creeper basically. an invincible one. When you run out fo charges use the rockets are until you get charge packs. It's really fun. Hope this was helpful.
This is a great game to play. Especially if you don't have Unity3D and don't wanna download it. What i would like o see in the future is a Multiplayer, other then that I love this game.