https://www.gamespot.com/articles/e3-2018-call-of-duty-black-ops-iii-is-free-for-ps-/1100-6459728/

If you have PS Plus, you can download and play Call of Duty Black Ops 3 for free. The deal is only eligible from June 11-July 11.

Sony announced this new PS Plus deal during their E3 2018 press conference. The deal is being promoted to give players a chance to try out Black Ops 3 prior to Black Ops 4's release later this year.