https://www.polygon.com/e3/2018/6/11/17451966/black-ops-3-playstation-plus-maps-black-ops-4

Call of Duty: Black Ops 3 is available on PlayStation Plus tonight. It’s a prelude to an offer Sony just unveiled for Black Ops 4.

According to the deal, fans who pre-order Black Ops 4 will get fan-favorite maps designed for that game, on Black Ops 3. The maps were shown in a trailer at the PlayStation live event at E3 tonight, in which a bullet passes through various terrains. These included Summit, Slums, Firing Range and Jungle.