Master Chief and the gang are coming back to PC in another outing next week. Halo 4 is ing the Master Chief Collection on November 17, so you have just over a week to wait before you can play it on Steam or the Windows Store.
The crossplay so you can play with pals and strangers on Xbox. Multiplayer is more or less as you it, but 343 Industries was testing input-based matchmaking during the beta, which means controller folk will play with other people using a controller, and the same for those with a mouse and keyboard.
You can also expect way more options to build up your forge maps, fresh customisation options for your Spartan, theatre mode, and new challenges – phew!
You can catch a trailer down below:

A new another delay, 343 Industries is sticking with that for now.