Sony has gone ahead and changed how exactly the PlayStation Plus games offer works for subscribers, changing the server to now offer two games per platform instead of its previous one game per platform.
In a post on the PlayStation Blog, Sony Computer Entertainment's PS Store and Plus content manager Chris Howe said Sony's goal is offer a "more balanced set of games" each month. The adjustment will also see how long you have access to downloading the free games being changed. Starting in July, every title in the Instant Game Collection will be available from the first Wednesday of the month and will be free for that month until the first Wednesday of the following month.
PlayStation Plus has been an essential part of PlayStation 4, providing access to next-gen online multiplayer and a steady stream of great games including Resogun, Outlast and Don’t Starve. Since we are always looking to continue the evolution of PS Plus as a service that really serves our community, we are excited to provide a more balanced set of games each month within the Instant Game Collection. As you’ll see below, starting in June, members will now have access to two titles per month for each of our platforms.
Howe warned that several of the games that have been a part of the Instant Game Collection for a long time will be phased out. SCEE's Fred Dutton elaborated on this in the comments: "Just to clarify, the annual 'evergreen' titles will not be replaced. Instead, you'll be getting one additional PS4 game every month. So, 2 x PS3, 2 x PS4 and 2 x Vita each month for the foreseeable future."
You can find full details on what titles will be leaving and what titles will be making their way into the service next month at the PlayStation Blog