Nioh and Outlast 2 will be free to download from the PlayStation Store from November 5 until December 3.
Action role-playing game Nioh is normally priced at $19.99/£15.99 on the PlayStation Store, while first-person survival horror Outlast 2 normally costs £24.99.
October’s PlayStation Plus games, The Last of Us Remastered and MLB The Show 19, will remain free to download for subscribers until November 4.
Sony shipped 2.8 million PS4 consoles during its second fiscal quarter, taking the system’s lifetime total to 102.8 million, the company said on Wednesday.
PS4 has now outsold Wii and the original PlayStation, making it the second best-selling console of all time.
Sony also said PlayStation Plus subscribers stood at 36.9 million as of September 30, 2019, up from 34.3 million a year earlier.