Oddworld: Stranger's Wrath

A bounty hunter known only as the Stranger is pursuing and capturing various criminals, trying to earn enough money for a mysterious operation. When he hears that a town populated by Grubbs has been invaded by a demon, the Stranger ventures there. The town was once protected by a race of creatures known as the Steef, who now appear to be completely extinct. The Stranger soon discovers that a nearby river has been dried up by a dam, built by a person called Sekto. The Stranger must confront this person as he continues to hunt down outlaws, revealing nothing about his past.