Crossplay

Is The Sinking City crossplay?

Crossplay does not apply to The Sinking City: it has no online multiplayer.

The Sinking City is a game of investigation genre taking place in a fictional open world inspired by the works of H.P. Lovecraft. The player incarnates a private investigator in 1920s, who finds himself in a city of New England, Oakmont Massachusetts. It's currently suffering from extensive waterflood, and its cause is clearly supernatural.