When it comes to the torture genre, it's hard to deny the Saw franchise stands above the rest. Since 2004, it's been detailing the exploits of Tobin Bell's John Kramer, aka Jigsaw. He decided to trap, punish and play games with all kinds of people, deeming it karma after his brain cancer diagnosis. Audiences didn't know it at the time, but he was a brutal vigilante.
Source:https://www.cbr.com/does-saw-x-have-post-credits-scene/