LostKnightsRPG.org

rules include:
just make something that is fun / fair to fight against?
other rules
make the sword guy impossible to communicate with
give out emeralds as opposed to rubies
remember there is an aoe emo tree that makes fighting rage drakes and iron maulers more difficult

that and pony immune mobs.. that are part ectoplasm

in summation

You enter a room
you find
and one mobs
go?

Very similar to that, yes.