The Old Guest

Have you ever heard the legend of Guest 0? also known as "The Old Guest" by most Roblox users. The legend states that Guest 0 was a very rare occurrence, or even a digital anomaly. Guest 0's appearance has always remained the same throughout each sighting, it always resembled the appearance of a Guest from 2010, a black "R" cap, grey shirt with "R" logo, light blue pants, and white skin.

The first report of the entity was in 2011, and it was apparently seen in Welcome to the Town of ROBLOXia. The entity was seen walking around aimlessly and not really doing anything or interacting with other players. The entity's behavior was also strange, as it would always run away from players coming near it. No matter how much the players caught up, they couldn't seem to get closer to Guest 0.

It was also reported to have an affect on the players that the entity visits, mostly creating bad luck for the players in the game. So let's say a player was playing Disaster Survival in the same server as Guest 0, the disasters would be much more catastrophic. Anyways, many people dismissed the legend due to Guest 0's behavior being so consistent with each sighting, many people say that Guest 0 was just a bot created by Roblox staff as a test for the Guest numbering system, but almost everyone knows this isn't true due to Guest 0's effect on the games it visits. Below are the most popular sightings of Guest 0 in order of year.

Town of ROBLOXia | 2011

 * Guest 0 was seen walking around the baseplate aimlessly, not interacting with players and doing its own thing.
 * The server was effected when skybox turned light brown, and all of the trees in the game started to explode all at once, making many players die.

Catalogue Heaven | 2012

 * Guest 0 remained in his normal appearance, pretty much stood in one spot until approached by other players.
 * The server was affected when all items in the catalogue were switched to free items. The effect lasted for two hours until Guest 0 left the server.

Build to Survive the Zombies | 2012

 * Guest 0 walked around the server aimlessly, running away when players came near.
 * The server was affected when the zombies and monsters that were appearing were appearing in massive numbers, so massive that the game would lag, and even crash.

Super Fun Obby | 2012

 * Guest 0 stayed on top of the spawn area, unreachable by players, and stood still.
 * Server was affected when the skybox turned a bright red, and all the obstacles increased in difficulty, or were entirely impossible to finish.

Classic: Crossroads | 2009-2010 (Unknown)

 * Guest 0 walked around the server, not interacting with players as usual.
 * Server was affected when all players were being repeatedly killed by rocket launcher bullets, making the game impossible to play.

Disappearance
The last time Guest 0 was seen was in 2013, but it is unknown what game it was seen in, each game changes with each report. Many people have made theories as to what happened to Guest 0. A user in 2017 made a theory that got slightly popular, the theory stated that Guest 0's data was taken by the hacker group running Vault 8166, and Guest 0 is now locked in containment in a lower level in Vault 8166. Many people believed that this was true, until the legend of Guest 0 eventually fell out of obscurity, and Guest 0 was forgotten forever.