There’s only one week to go before Halo 4 hits store shelves, but 343 Industries and Microsoft are still releasing previews for the game’s numerous gameplay modes.

Today, the trailer for the first “season” of Spartan Ops has been released. For those who haven’t heard, Halo 3: ODST‘s and Halo: Reach‘s Firefight mode has been renamed to Spartan Ops. The renamed mode still features up to four player co-op as players battle waves of Covenant and Promethean enemies. This time though, Spartan Ops will be tied-in to campaign and takes place six months after the events in the Halo 4 campaign. 343 has announced that the mode will be an “ongoing, episodic cooperative experience.”

Each week, an episode of an ongoing animated series will be released along with five accompanying missions. These expansions are free with the purchase of the game, and the trailer below shows that the first season of Spartan Ops will include 10 animated episodes and 50 missions.