If you want single and multiplayer and many hours of fun, you should get aoe4. I think it's a great rts game and new civs were recently added for free, no dlc to pay for. Multiplayer rounds 3x3 or 4x4 typically lasts 30 min - 1 hour, rushes not included (there is also 1v1, 2v2, ranked and coop but I rarely play those). A round can be even longer, in the longest round I played neither side could hold the sites nor build a wonder, it lasted awhile.