[Slingin]

Cross platform servers?

No.  Halo 5 on PC is called Halo 5 Forge.  It is a port of Halo 5 in a sense, but an in depth version of Forge mostly.  However, there is a custom game browser that uses dedicated servers.  Thus, making it more similar to other Halo games on PC.  No matchmaking is available.  I believe this was a "testing the waters" type scenario to possibly cross platform Halo 6 using cross platform play.  If that is the case, you can catch me on the pro circuit after launch  ;)