Forty

 is a slaver at Paradise Falls and is Eulogy Jones' (fairly dim-witted) second-in-command. He wears Combat Armor and wields a Chinese Assault Rifle. He also has a key (Paradise Falls box key) to the Pulowski Preservation Shelter (The Box) in Paradise Falls. Forty has noticeably more health than the average human opponent, although not to an exceptional degree (he's able to survive a few more hunting rifle head shots than usual before dying).

The Lone Wanderer will first meet Forty outside the entrance. Many think Forty shot the escaping slave. Then, through a conversation with you, he will explain about the Slave Collar. Afterwards, he will never engage in proper conversation with you, simply telling you to "piss off"--unless you are following the Rescue from Paradise quest, then he will have a conversation where you can "distract" him.

Apperances
 only appears in Fallout 3.