Become a Friend of the Blackfoots

Become a Friend of the Blackfoots was going to be a quest in Van Buren, the canceled Fallout 3 by Black Isle Studios.

Background
You can't actually join the tribe in-game, but you can talk Chagas or Kurisu into naming you a friend of the Blackfoots, which gives you some advantages among them (discounts on stuff, mostly) but also gives you a bad reputation among other groups (because of your association with the slaving Blackfoots).