Guests were known as "The True Testers of Roblox" by the administrators. When a player hovered the mouse over a guest image when viewing game servers, the name used to appear as "A Friendly Guest". This was changed to read "A Roblox Player" before the Guest feature was removed.
If a player joined a game while not logged into an account, they would be labeled as a "Guest".
It was possible to be a guest by either using glitches or using trustworthy unofficial extensions, which allowed one to play as a guest. This was patched in early November 2018.
Guests now get Error code: 524 (Not authorized to join this game.) when attempting to join a game.On November 4, 2017, Roblox re-added guests by mistake. This change lasted for a day before being reverted.
From 2008 to 2015, Guests were able to speak by only using safe chat words. With the removal of Safe Chat in 2016, though, they became completely unable to speak or see messages sent by others, which meant guests would have to create an account to chat in any way. Sometime in 2016, guests were given the ability to see any messages sent by others.
From June 2017 to October 2017, players using the Guest feature were only given 20 trial plays before they had to create an account on Roblox to continue playing; prior to that date, they had been given unlimited trial plays. This was to encourage them to try out the game and eventually, create an account to play on Roblox. A notification would appear for anyone playing as a guest to remind them of the number of trial plays remaining.
Roblox stores a cookie on the user's computer that keeps their ID. Cookie editors were able to change a guest's ID number by changing the UserID in "GuestData". Guests had a randomly assigned number from 0 to 9999 whenever they entered a place. Other than users who joined before the removal of spaces in usernames, they are the only users who could have spaces in their username.
When Guests played games that save data (like in-game money), they did not lose their data after exiting a game if they got the same ID number again. However, this was very unlikely.
When guests were first introduced in 2008, they appeared in the classic noob colours of yellow head and arms, blue torso and green-yellow legs.
Later, Guests would be given the same appearance as the "ROBLOX" account, including hats, allowing Guests to technically "try" accessories and have the ROBLOX account's gears.
After that, gender options were added, allowing Guests to appear as "BillyBloxxer" or "BettyBloxxer". They had very similar appearances to the user ROBLOX but had different hats depending on the gender chosen. BillyBloxxer wore the Red Roblox Cap, while BettyBloxxer wore the Pinktastic Hair.
On July 12, 2016, the appearances of the guests were modified for the first time in a while. The male guest (BillyBloxxer) wore a Roblox jacket, black jeans, and the True Blue Hair. The female guest (BettyBloxxer) is similar to the male guest except it wore the Lavender Updo Hair. The other guest type (DefaultGuest) looks similar to both the other guest types except it was bald. On September 13, 2016, guests began to wear the Robloxian 2.0 package and the DefaultGuest started wearing the ROBLOX 'R' Baseball Cap. Sixteen days later, the R15 body was applied to guests. (If the game were set to R6 Only, then R6 would have been applied.) After Roblox introduced a new logo, the guest's shirt changed to the new Roblox Logo Jacket on January 16, 2017 (six days after the logo began usage).
On July 1, 2017, guests would sometimes appear with grey skin and a random torso colour due to the default clothing update in Roblox.
If playing on mobile, users will be loaded as a genderless guest (DefaultGuest). All guests that joined a game on mobile Roblox versions wore a Roblox jacket and jeans, the 2.0 body, and the Roblox 'R' Baseball Cap due to not being able to choose if they wanted to be a male or female guest in the mobile versions.
Guests were criticized mostly for being new and clueless players and for having fewer features than a normal player has. They were also criticized for being commonly used to exploit in games, plus being able to evade bans easily.
There had been various petitions on Roblox to remove Guests, but Shedletsky stated that guests were not going to be removed. Contrary to this statement, Nightgaladeld confirmed that Guests would be removed.
Removal of Guests
On October 2, 2017, support for Guests were officially announced to be dropped. Guests could sometimes join in through different methods until November 24, 2018, when they were fully removed, as it now shows an error code. Knightgaladeld stated that the reason was to increase the number of users in Roblox. Unregistered users can still access the website, but cannot play games, change an avatar, leave comments, or create things. Most players supported this decision; however, some players opposed the decision and were vocal in protecting the Guest feature on places such as the Forums.
The cookie named "GuestData" can still be found in Roblox's cookies but has no functionality.
A few games had chats that allowed Guests to type normally. They no longer function due to the removal of Guests and various Roblox updates.