DC Universe Online will allow cross-play between 2 platforms

DC Universe Online
Crossplay platforms
Release Date: Jan 11, 2011
Official Website: Link
Crossplay platforms:
DC Universe Online will support cross-play across multiple platforms. It will be possible to play together with your friends on Windows PC and Playstation 4. Please check out all the details on the game's official website!
Summary:
DC Universe Online is a free-to-play superhero / supervillian MMORPG that lets players create their own unique tights-wearing hero or villain and roam the streets of places like Gotham City and Metropolis fighting or creating crime. Players fight alongside such iconic DC Comics characters as Superman and Batman, Lex Luthor and The Joker, and many others. Excellent physics help bring comic book action and combat to life, all under the creative direction of noted comic book artist Jim Lee.

Screenshots:
DC Universe Online is also known as:
  • DCUO
Supported game modes:
  • Multiplayer
  • Co-operative
  • Massively Multiplayer Online (MMO)
Supported player perspectives:
  • Third person