Gameplay:
Able to shoot while sitting on the side of a helicopter, like sniping from a little bird.
loading ammo boxes into vehicles like trucks and helicopters/cargo planes.
weapon wear and tear, over a long time of course not like farcry 2 where you shoot 50 rounds and the gun blows up in your hands.
working shrapnel during explosions like if a car blows up you can be wounded or killed by flying parts.
Able to survive some heli or plane wrecks that aren't that bad.
Editing:
a script inserting program. so you can past a script in the folder of the program then pull it up in game to put it in the game.
3D editing.
Single weapon placement.
Weapons Vehicles:
Ak 47 and variants
Lots of civi cars
Large cargo boats and cargo planes
Uzi and mac-10
Multiple shotguns