Go loads on the go at present:
3 kingdoms total war - dong Zhou campaign
Witcher 3 goty- playing with ghost mode after finding EE mod to hard to master.
Steel division 2 - solid rts but awaiting a few hot fixes as it was probably released a month to early. New campaign is great though.
Baldurs gate EE - running with a 99 roll paladin.
Battle brothers - solid game and really hard, great challenge if you like these kind of games, mount and blade style map with tile based combat.
Close combat last stand Arnhem - remake of bridge to far, bigger campaign map but ai sucks, would be great versus human.
Multiplayer wise I am playing Stellaris and Civ 4 with a good friend. Civ 4 ai is so good.