Oddworld: Stranger's Wrath

The game details the adventures of Stranger, a fearsome bounty hunter. Throughout the game, Stranger pursues and captures outlaws in order to collect bounties. The goal is to ultimately earn enough moolah (in-game money) to pay for a mysterious life-saving operation. One of the most notable features is the "live ammunition" system, which is ammunition made of living creatures like fictional insects and small mammals, each with different uses and effects against enemies. (Wikipedia)