Microsoft has released a trailer for this week's Halo 4 Spartan Ops DLC.
Here's the official blurb for the latest DLC, which is titled Memento Mori and available to download now:
"Secrets are revealed, trusts betrayed and the Sangheili leader Jul 'Mdama's ultimate plan nears success. As Infinity's command crew makes a discovery that changes everything we thought we knew about the Forerunner Prometheans, the Spartans must attempt to rescue one of their own."
Each week Microsoft is releasing five 10-15 minute long Spartan Ops missions as DLC, which are included in the retail price of the game.
Set around six months after the events of the campaign they essentially form a sequel to the main game focusing on two Spartan squads, Crimson and Majestic, rather than furthering Master Chief's storyline.
Season one of the Spartan Ops DLC will consist of ten episodes and 50 missions.