Oddworld: Stranger's Wrath HD

Story-related. Cannot be missed.
When you arrive at Fatty’s camp, stay outside of it and wait for the Outlaws. Fatty has a lot of Outlaws under his command and they will all head in your direction, sometimes in groups of two or three. Fatty himself will be firing rockets in your direction, but you should have no problem avoiding these. Deal with the Outlaws as necessary, with Stunkz particularly being handy, and then head into the camp. Be aware of the Snipers and then take on Fatty.

Fatty himself is not too difficult. He will try and launch himself in the air and land you, dealing a fair amount of damage. Afterwards he will run back to the top of his shack and continue launching rockets at you. Dodge all of his attacks and try and get close enough to knock him out with your Zappfly/Thudslug combination to bag your final bounty.