Halo 4 on Xbox 360 Image / Screenshot

Episode three ofHalo 4's Spartan Ops co-op campaign is now available tow download on Xbox 360.

Like its predecessors, it is completely free to download and takes place where last week's episode, "Artifact", left off — with the Forerunner artifact causing the UNSC Infinity and its crew so many problems. As you'll soon find out, the Infinity is home to the currently incarcerated Dr. Catherine Halsey who is brought in to help solve the mystery.

Some call Dr. Catherine Halsey a war criminal, others believe her creation of the Spartans saved humanity from extinction. Whatever you believe, right now she is the UNSC Infinity's only hope to understand the mysterious artifact retrieved from Requiem, and she needs your boots on the ground to get more intel, Spartan.

343 Industries has released a trailer for Episode three, which you can watch above. This is the first of 10 planned Spartan Ops episodes that will be released over the next few weeks.

Tags: Halo 4

By Matt Liebl