Spartan Ops

Spartan Ops is a planned episodic cooperative campaign, set to appear in Halo 4 as a part of the Infinity game mode in lieu of Firefight. It will allow up to four players to play cooperatively. Though it is designed primarily as a cooperative experience, Spartan Ops can be played solo as well. It will follow the SPARTAN-IV units Majestic Squad and Fireteam Crimson on their many missions.

Features
Each week, players with Xbox LIVE Gold membership will have access to a cutscene that will tell the story of the 's mission, set six months after the events of the campaign. Each new story component will have five objective-based missions to go along with it. The missions offer new content, as well as challenges to complete for each week.