Guest 666 is an old Roblox myth and creepypasta who was rumored to have admin commands in any games they joined (even ones without admin built in), and whenever a player hovered the mouse over a guest image when viewing game servers, their name used would appear as "An Evil Guest" instead of "A Friendly Guest" like it normally does.Unlike other myths, there isn't an exact date available that could tell when the myth came into existence. It's possible that the legend was going around ever since guests were created in 2008, making it one of the oldest myths to date. Soon after its inception, the myth was proven to be false as it turned out that you could use browser extensions such as Edit This Cookie, which allowed you to change your guest ID, and doing, one could become Guest 666. This did not grant the legendary Admin abilities that Guest 666 supposedly had. After Roblox announced the removal of Guests in October of 2017, the myth itself largely ceased to exist as it was impossible to see or play as Guest 666 following the update. It is assumed that Guest 666 looked the way any normal guest would (which changed multiple times with various Roblox updates), but some people portray them as having black skin and blood red eyes.It was said that Guest 666 would use admin commands and chat when in-game, which was something normal guests couldn't do. However do to the myth being fake it is very likely these are all just speculations and rumors. Unlike the other guests, Guest 666 was supposedly capable of using chat to view messages and talk themselves.

Guest 666:using admin commands to fly around watching all of Roblox Players

Guest:5183:Yooo dude what are you doing

Guest 518:yo man I don’t like this Roblox game

Guest 1245:this Roblox game is creepy

Female Guest 7019:yeah this game is creepy AF I really don’t like it…

guest 5183 is your friend along with guest 518 and guest 1245 and with female guest 7019 and you were also a female guest that was named female guest 8065