Works but needs a glitch

A lot of the negative reviews on this game are because its simply does not work, and you are unable to access multiplayer and zombies. I was having this problem as well and if you are having the same problems all you need to do is follow these steps. First, log out of game center and turn off your Wi-Fi. Then, restart your computer and turn your Wi-Fi back on. Do not sign into game center. Click on the black ops game and when the game center prompt pops up use that to sign into game center. This has worked for me and continues to work for me today. hopefully it will work for you to. If you continue to have these problems simply repeat these steps! Hope it helps.

ShadowPlaysMCPE about Call of Duty®: Black Ops, v1.19