Backgrounds I did a few years ago for the characters of the game I made. I wanted them to be connected to the characters in the world we set the game in. We wanted the game to have an old school feel, not taking itself too seriously.
You can read a bit more about the game here: https://www.artstation.com/blogs/stotka/dzz7R/released-a-game-i-made-with-a-friend-barely-racing
If you would like to try the game: https://store.steampowered.com/app/1351480/Barely_Racing/