Tech ‘Call of Duty: Warzone’ sets its sights on battle royale gaming March 10, 2020USA TODAYComments Off on ‘Call of Duty: Warzone’ sets its sights on battle royale gaming Free-to-play online games like "Fortnite" will earn about $88 billion globally in 2020, as Activision's new "Call of Duty" enters the mix.