can't play my mobile save file on pc

[PuffyPenguinYT]

I cannot sign in to my mobile account on steam and i want the game to have full cross-platform capabillities

[ak-ryuu]

They're different games. There won't be cross-platform, it wouldn't make a lot of sense.

Mobile MSM is a mobile live-service game, you typically check it briefly several times a day (e.g. whenever you get a notification) because you usually have your phone with you, it's ad-driven, you get free speedups and spins from ads, plus the offerwall.

Steam MSM is an idle-type live-service game, you typically sit down 1-4 times a day to play it for 5-30 minutes, and you don't get "free" stuff in return for ads.

Same basic gameplay, same updates+events, but vastly different playing style, different economy, different playerbase, separate servers.

If you want to play Mobile MSM on PC for some reason, you'll need a mobile emulator like bluestacks. Making the Steam version a crippled login option for Mobile MSM (since Steam cannot have mobile features like ads) instead of a standalone Steam game would have been a waste of their development time/money, as that wouldn't have gotten them a new potentially paying playerbase.