Here are some tips to help you get higher-level gear in multiplayer:
It does NOT work on the PS3 & Xbox 360 versions, because those don’t come with the needed story campaign nor Safehouse. Note: This only works on the PS4, Xbox One & PC versions of the game. Now you can access the data terminal with the Square button on PlayStation / X button on Xbox, and then move the on-screen selection to press the secret button that is visible in the top-left corner of your screen (select the octagon logo there).
Simply go back to the Main Menu and select the “Campaign” section again, but instead of selecting “Resume Story”, you choose to “Go To Safehouse”.
There’s how to unlock the hidden arcade game in Black Ops 3:
