Spartan Ops,
Halo 4's cooperative, episodic missions returned Monday with episodes 6-10.
The story follows Fireteam Crimson, the Spartan IVs aboard the UNSC Infinity. Jul Mdama and his Covenant separatists are the enemy as Crimson searches for Spartan Thorne, while the new Prometheans make their return as well.
While the first half of season 1 launched altogether with Halo 4, the new episodes will release weekly until February 24. There is no additional charge for the updated content.