Someone had to be High to come up with this plot...

What is the most messed up idea for a game that you've played? We've all played at least one game that you just stared at blankly for a moment trying to grasp the unholiness. What game have you started playing and then you said to yourself, 'Who the f*** was high (or psychotic) to come up with this?'
My own personal choice on that score would have to be...