Aside from Halo: Combat Evolved, Halo 3: ODST is the only other Halo I've ever played. That's supposed to be a compliment, though I'm unsure if it came off as dismissive of the rest of the series. Regardless, ODST (which stands for Orbital Drop Shock Troopers) is the fifth installment of Halo: The Master Chief Collection on PC. ODST drops on Tuesday, September 22, which will be 11 years to the day since ODST's initial release date on Xbox 360.
It's optimized for PC with a fully remastered campaign. Plus there's ODST Firefight which is up-to-four-player co-op with waves of enemies swarming in a horde mode. Of course, the thing I remember most about this 2009 video game is the detective vibes. This is the most urban rainfall and saxophone soundtrack you'll find this side of L.A. Noire.
The release schedule for The Master Chief Collection has been as follows:
Halo 4 is the final installment in the collection. If everything proceeds as normal, that final release looks like it could be in November, in time for Turkey Day.