I don't tend to cross post with my free RPG blog (it has its own place) but this is worth noting. MrE and I ran a 24 Hour Competition recently where we listed a load of films and asked people to mash two together and write an RPG in 24 hours. There were a reasonable mix of playable tropes and there there was this by Nathan Russell:
A mashup of Clockwork Orange and The Sound of Music.
Bloody hell.