1. Boong Ga Boong Ga
Unfortunately yet to grace the arcades of the west, Boong Ga Boong Ga is a South Korean creation that is...er...extremely unique. If I was being mean, I'd say it's one of the most weird things I've ever heard. Let me explain it to you. Boong Ga Boong Ga is an arcade machine that actually includes a model of a human's backside on the front. On screen, a character model's face is shown of your choice. The aim of the game is twofold: one, you must spank the posterior, and two, you must perform kancho on the posterior using a supplied plastic finger. If you're blissfully unaware, Kancho is a popular apparent prank activity in Japan where a person tries to shove two fingers up another's anus while they're distracted. Clearly a concept that needed to be integrated into a game I'm sure you'll agree. It gets worse though: you can even select which person you'd like to play the prank on! Selections are "Ex-Girlfriend", "Ex-boyfriend", "gangster", "Mother In Law", "Gold-digger", "Child Prostitute", "child molester" and "Con-artist".
So what absolute ridiculous gems of the past did I miss off from my list? There's bound to be some crap out there you've experience too, so why not let the power of your fingertips tell me what they were down in the comments?