As per usual, those on Xbox Game Pass for PC (or Xbox Game Pass Ultimate) will be able to download and play the game as part of their regular subscription fee. The Master Chief Collection also offers Halo Reach, Halo and Halo 2 on PC. Halo 3 ODST and Halo 4 will be added on PC later this year.
Of course, all the Halo games detailed above are already available on Xbox One inside The Master Chief Collection.
Halo The Master Chief Collection is available on both Windows PC and Xbox One. Halo Infinite, the next in the franchise, will be showcased later this month on Xbox Series X, though it also will be available on PC and Xbox One.