MCC on steam, Halo Wars 1 on steam, heck even the phone games (Spartan Assault) on steam, and Infinite will be on steam as well. Where is Halo Wars 2? Infinite got delayed so why not throw a bone and release a definitive edition of Halo Wars 2 on Steam with all dlcs and crossplay? It's already on the Windows 10 store so most of the porting work has already been done unlike with MCC. Don't have to worry about complaints over cross-play as well since aim assist doesn't exist in an RTS.
So when's the steam release?
OP Drowsy Demon