Free bioshock theme http://www.ps3-themes.com/ type in this link and search for bioshock some cool themes honestly not sure if ps4 has free bioshock themes. : r/Bioshock
Post your favorite Custom PS3 Themes - One last Hurrah | NeoGAF
PS5 theme for PS3, My first PS3 Theme. (download link in comments) : r/PS3