War Thunder will allow cross-play between 5 platforms

War Thunder
Release Date: Jan 28, 2013
Official Website: Link
Supported game modes:
  • Single player
  • Multiplayer
  • Co-operative
  • Massively Multiplayer Online (MMO)
Supported player perspectives:
  • First person
  • Third person
  • Virtual Reality
Crossplay platforms:
War Thunder will support cross-play across multiple platforms. It will be possible to play together with your friends on Playstation 4, XBox One, Windows PC, Linux and Mac. Please check out all the details on the game's official website!
Cross-Platform Combination Details:
Source: Link
Additional Info: none
Summary:
War Thunder is the most comprehensive free-to-play, cross-platform, MMO military game dedicated to aviation, armored vehicles, and naval craft, from the early 20th century to the most advanced modern combat units. Join now and take part in major battles on land, in the air, and at sea.
Screenshots:
Image 1Image 2Image 3Image 4
Artworks:
Image 1
Supported game modes:
  • Single player
  • Multiplayer
  • Co-operative
  • Massively Multiplayer Online (MMO)
Supported player perspectives:
  • First person
  • Third person
  • Virtual Reality