QUICK ANSWER

Is Nivalis Nights multiplayer?

Nivalis Nights is listed as single-player on Steam. The current listing does not advertise multiplayer or co-op.

Can you share a city with friends?

There is no shared-city multiplayer mode advertised in the official listing checked on September 30, 2026. Steam Cloud is a save-sync feature; it does not establish co-op support.

Playing alongside friends

You can compare your separate saves, talk about business choices and share screenshots while playing independently. That is a social way to enjoy the game, rather than an in-game multiplayer feature.