From publisher blurb:
The Combatant is an explicitly nonsupernatural hand to hand combat master. They excel in fighting single, powerful opponents. They can act as a human(oid) shield for their allies, tying up even the largest and most deadly monsters. Combatants defend their comrades by taking hits, spitting out teeth and snapping necks in retaliation.
Because the Combatant relies on training rather than supernatural talents, the Combatant is equally at home in D20 Modern campaigns, presenting a flavorful and highly competent alternative to Strong, Fast, Tough Heroes and Martial Artists. The Combatant is also a good choice for non-magical, low magic or sword and sorcery Pathfinder Roleplaying Game Campaigns, and is especially well suited to campaigns with a Greek or Roman gladiatorial flavor, well-representing an elite pankraton wrestler. Combatants have less access to magical weapons and armor than other characters, relying instead on their own innate skills.