Orc Attack: Flatulent Rebellion

Fart or die in this hack-and-slash action game, where fun-loving Orcs battle pollution loving Humans in a humorous fantasy setting. Orcs have become victims of brutal Human expansion, as they are carelessly poisoning the environment. Now, four trained Orc heroes are retaliating with a Not-So-Silent yet very deadly plan. In either single-player or up to four-player co-op, you will take on the role of Orcs, each wielding a unique gaseous ability, and then take the fight to the Humans in a stinky, fart-filled romp.

Source: TheGamesDB