Key/Revenge

Revenge is the fourth chapter of Spartan Ops ' ninth episode, Key.

Summary
While searching for Catherine Halsey, Crimson returns to Lockup. They are dropped off with some Marines and secure the area. They move on to the next area and eliminate the Covenant forces there as well. Robert Dalton detects Marine IFF tags nearby, when Crimson goes to investigate they were ambushed by Covenant forces. Crimson holds off multiple waves of reinforcements including several Wraiths and Hunter pairs. As they were about to be picked up Dalton detects more Covenant reinforcements incoming. Jared Miller tells Crimson to get ready.