On Android device, navigate to 'Apps' > 'Settings' > 'Security', enable 'Unknown Sources', then tap 'OK' to agree to enable this setting. This will allow the installation of third party apps and standalone APKs.
Call of Duty: Black Ops III supports two-player split-screen online play in Multiplayer or Zombies game modes. Xbox One and PlayStation 4 support split-screen for up to four players in Multiplayer, but only in local play. Please note: Xbox 360 and PlayStation 3 do not support split-screen.