Old-Tyme Brawler

 is an achievement in Fallout: New Vegas which is awarded for successfully dealing 10,000 points of damage with unarmed.

The easiest way to get this achievement is to obtain the Ballistic fist. This weapon does an incredible amount of damage. After obtaining it, go to The Strip and kill everybody in Ultra-Luxe, because they are quite weak opponents. Be sure to save before this.