While it doesn't look like Halo 5 will be released on PC, Microsoft has already announced that Halo 6 will be released on PC.

Anyone who wants to play Halo 5’s multiplayer offering when they get their hands on the game is going to need to download a 9GB update first.

343 Industries has published a variety of stats and figures about Halo 5: Guardians, including that its campaign can be completed in 8-12 hours of normal difficulty.