[Slingin]

...well. Part of Halo 5 for PC has been confirmed.  The part that matters.  I can only wait to see what the modding community can do with this.

Halo 5 for free

Baically Forge is coming to Windows 10, but not matchmaking or the campaign.  However, you will be able to host games through this on windows 10.

So that leaves a couple of issues. Do you have Windows 10 or willing to upgrade?? Or, do you even have a MS live Gold Account.