[~^_^~]

Well, you only actully need to save 6 (i think) to get through the whole game, and they are just for gates at the beginning of levels or further in. Thats for the bad ending. The rewards for AE good ending is a "Bullet proof vest" that can protect you from harm from sligs. In AO, you get "Unlimited Grenades", and thats pretty self explanatory :P.