Yes, That’s Right Black Ops 3 FREE!
It has been announced that up until July 11th if you have PlayStation Plus you can get Call Of Duty: Black Ops 3 for FREE! Just head over to the PS4 Store and you can download it now.
Also, it was announced that if you have pre-ordered Black Ops 4 on the PlayStation Store you will get four free new fan favorite maps added to Black Ops 3. The are Slums, Jungle, Firing Range, and Summit
These maps were first announced to be coming to Black Ops 4 but have been added to Black Ops 3 as an added bonus for pre-ordering Black Ops 4.
PlayStation Blog had this to say on the added bonus to Black Ops 3,
To further sweeten the celebration of this beloved franchise, if you pre-order Call of Duty: Black Ops 4 through PlayStation Store, you’ll get the “Back in Black” maps for Black Ops 3. Back in Black maps are immediately playable for Black Ops 3, and include fan-favorite maps – Jungle, Summit, Slums, and Firing Range – and they are available only for PlayStation fans. This pre-order offer is open to all PS4 owners via PS Store, so don’t miss out.
Source: PlayStation Blog