http://www.pcgamer.com/halo-wars-2-is-getting-crossplay-between-pc-and-xbox-soon/

Following last month's Awakening the Nightmare expansion, Microsoft and Creative Assembly continue to plug away at Halo Wars 2 support, with newly announced crossplay functionality confirmed today. This means you'll be able to compete against Xbox One players – a concept the company is pretty fond of nowadays.

"As an Xbox Play Anywhere title, players have the ability to enjoy Halo Wars 2 on their console or PC, but up until now that has not included cross-platform online play," the update reads.