chapter 1: no no no, outside the ship
beginning with a cutscene of infinitys bridge and making the jump to slip space, the last of the promethians have gone EVA and are trying to breach the hull and kill everyone in vacuum. Chief takes buck, kelly, and Locke into EVA and the level begins.
You climb out of the access panel closest to the position of the promethians and must try to navigate the hull of infinity while in slip space to get to the promethians. Once there, the promethians are almost done and you must stop them and then repair the hull.
Chapter 2: honey I’m home!
arriving at earth the infinity immediately activates its upgraded cloaking systems and sends a signal on all UNSC frequencies with their earning of cortanas plan while keeping the E-band on just in case of any survivors with a working signal transmitter.
Infinity picks up a signal on the E-band and its from the war games orbital platform, asking for any help. Your job is to take all of blueteam major and rescue all Spartans on that station. This leads to fighting promethians on re-creations of your favourite maps from all the halo games while rescuing survivors. Once you have all the Spartans you get them on board the infinity and lasky debrief a them on what their next move will be.
and that’s it for this level