https://www.gamespot.com/articles/last-chance-spider-man-ps4-freebie-is-available-fo/1100-6461579/

To celebrate the launch of Insomniac's Spider-Man on September 7, Sony is offering a free Spider-Man theme for PlayStation 4. It's a static theme that features a Marko Djurdjevic-illustrated image of Spidey swinging into battle against Rhino and Scorpion. It's set against music from the game and gives all of the PS4 system icons a Spider-Man pattern. Make sure to claim the freebie soon, because the offer ends right when the game launches.

To get your free theme, visit the launch countdown page for Spider-Man, scroll down, and click "Claim Reward." A window will pop up with a code you can bring to the PlayStation Store to redeem. Once you do that, you can select it from the Themes section of the settings menu. Now Spider-Man is slinging webs on your PS4's home screen.