It is still an active service that allows you to play Black Ops 2 multiplayer online. However, if you are referring to the Xbox 360 servers being shut down, it is possible that online multiplayer for Black Ops 2 on Xbox 360 may no longer be available.

If you're having trouble connecting to the Call of Duty: Modern Warfare, you should first check Call of Duty: Modern Warfare Server Status. If the status indicator for your platform is not green or an alert is present, you might encounter connectivity issues until service is restored and fully operational.

Can Black Ops 2 be played on a PS4? Not as of 2024. Black Ops 2 was originally compiled to Xbox 360, PlayStation 3, and Windows PC. The PlayStation 3 is notoriously hard to emulate, meaning unless they allow Windows executables or Xbox 360 code to run on a PS4, it is probably not going to happen.