The gameplay of Warfighter includes six different classes which are Assault, Sniper, Demolitions, Point Man, Heavy Gunner, and Spec Ops. It uses a fire team system where two people must work together and there are certain perks to working as a team. "Support-actions" return in Warfighter, and now have a bigger impact on the gameplay and how one approaches situations. Also, when one acquires a kill-streak, the player is given a choice on of one or the other, larger kill pile-ups will have greater rewards.
Source: Wikipedia, "Medal of Honor: Warfighter", available under the CC-BY-SA License.