Dyin' Ain't Much of a Living: Kill 5 members of the NCR or Legion hit squads with weapons affected by the Cowboy perk (Perk not really required to complete this challenge) Even a God-King Can Bleed: Cripple Caesar's head with Throwing Spears. Historical Propriety: Kill Caesar with a Knife or Combat Knife. Nyah! See?: Kill 10 Chairmen, White Gloves, or Omertas with any sub machine gun, light machine gun, or minigun. Sic Semper Tyrannis: Kill President Kimball with any One-handed pistol. Talk About Owned: Kill Benny with his own gun, Maria. Vault 13's Revenge: Kill 15 Super Mutants with 5.56mm Pistols, Plasma Defenders, Plasma Grenades, Power Fists, Rippers, or the Bozar. White Line Nightmare: Kill 20 Fiends, Vipers, or Jackals with Tire Irons, Baseball Bats, Lead Pipes, Machetes, .44 Magnum Revolvers, or Sawed-Off Shotguns.