Death Carnival will allow cross-play between 4 platforms

Death Carnival
Official Website: Link
Supported game modes:
  • Multiplayer
  • Co-operative
Crossplay platforms:
Death Carnival will support cross-play across multiple platforms. It will be possible to play together with your friends on Windows PC, Linux, Mac and Google Stadia. Please check out all the details on the game's official website!
Cross-Platform Combination Details:
The release date is unknown.
Source: Link
Additional Info: We will have full connectivity with all platforms, including multiplayer crossplay, and synchronized account progress.
Death Carnival is a fast-paced top-down shooter with extreme weapons & online multiplayer mayhem. In a future world, broken by war, humanity endures in a few overcrowded cities. To escape their bleak reality, many turn to televised combat sports, the most popular being Death Carnival. In this deadly game show, contestants must battle against hordes of monsters and machines for fame and fortune on live TV.
Genres and Themes:

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Supported game modes:
  • Multiplayer
  • Co-operative