Forza Horizon 4 will allow cross-play between 2 platforms

Forza Horizon 4
Crossplay platforms
Release Date: Oct 2, 2018
Official Website: Link
Crossplay platforms:
Forza Horizon 4 will support cross-play across multiple platforms. It will be possible to play together with your friends on Windows PC and XBox One. Please check out all the details on the game's official website!
Dynamic seasons change everything at the world’s greatest automotive festival. Go it alone or team up with others to explore beautiful and historic Britain in a shared open world. Collect, modify and drive over 450 cars. Race, stunt, create and explore – choose your own path to become a Horizon Superstar.
Genres and Themes:
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Supported game modes:
  • Single player
  • Multiplayer
Supported player perspectives:
  • First person
  • Third person