Jeeeez...just about everything. Environmental, animals, car & street, even amusement park. One whole disc of just military sfx (air raid sirens, all types of small arms, missiles, rockets, artillery, full scale battles, huey gunships, a 20mm Vulcan cannon, etc.). One whole disc of planes, trains and automobiles, and a 2 disc set of just about anything under the sun. Unfortunately, no sci-fi fx at the moment, but damn near everything else; I even have the full cycle of a .50 cal mg: load, lock, cock & fire.
No matter where you go, there you are.