Famously (well, famous if you were into MMOs & high-end raiding 10 years ago), EQ did something similar to what you describe. An end-zone boss wasn't supposed t

Famously (well, famous if you were into MMOs & high-end raiding 10 years ago), EQ did something similar to what you describe. An end-zone boss wasn't supposed to be reachable before obtaining certain keys that weren't even in the game yet. Folks that had used in-game mechanics to bypass the doors one day logged on to find items like http://everquest.allakhazam.com/db/item.html?item=17057 http://everquest.allakhazam.com/db/item.html?item=17057 replacing their original loot.