Playing the Master Chief Collection was when I was finally able to give this campaign a shot. I played a lot of firefight back when I had my hands on a 360, but I've since forgotten the specific details of it. When I tried its firefight out again, I was really confused: I was weaker, more vulnerable, wondering if maybe the developers nerfed Master Chief a little too much. Then I played its campaign. Thanks to really good plot establishment, I quickly realized I wasn't actually Master Chief, and next thing I knew, it ended up being my personal favorite campaign in the series. Probably the most optimistic of the series to me, which is kind of ironic because the scenario is dark and gloomy.