A guest is a special user who can only access certain ROBLOX places (such as free places, which aren't Builders Club only or paid access) and cannot access most website content without signing up for an account.
If a player joins a game but does not register or sign in, they are labeled as a guest by default. The guest's avatar is a placeholder for players interested in a game and want to play it before creating an account. The placeholders are BillyBloxxer, BettyBloxxer and DefaultGuest.
BillyBloxxer, BettyBloxxer and DefaultGuest are the ROBLOX guest templates. Joining in-game as a guest will load one of their character appearances unless the developer of the game uses a Script to change this.When guests first appeared, BillyBloxxer and BettyBloxxer had very similar appearances to the user ROBLOX. Their only difference is that Billy Bloxxer wore the Red Roblox Cap, while BettyBloxxer wore the Pinktastic Hair. The DefaultGuest doesn't have an accessory; merely black limbs and a grey torso.
On July 12, 2016, the appearances of the guests were modified for the first time. The male guest (BillyBloxxer) now wears the ROBLOX Jacket, the Black Jeans, and the True Blue Hair. The female guest is similar to the male guest except with the Lavender Updo Hair, which looks similar to the Chestnut Bun, but a different colour. The other male guest (DefaultGuest) is still similar except that it wears the ROBLOX Jacket and The Black Jeans. On September 13, 2016, guests began to wear the Robloxian 2.0 package and the ROBLOX 'R' Baseball Cap. Sixteen days later, the R15 body was applied to guests. 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).
With the addition of new updates, both new users and guests can pick a gender for their character. Users can choose the male guest, which wears the ROBLOX Jacket, the Black Jeans, and the True Blue Hair. Users can also choose to be the female guest, which is the same as the male guest except it wears the Lavender Updo Hair. If playing without choosing your gender or playing on mobile, users will be loaded as a genderless guest (DefaultGuest).
- Guests are known as "The True Testers of ROBLOX" by the administrators.
- DefaultGuest came on ROBLOX around December 2012 and January 2013.
- There was a guest talk script in some games, which allowed guests to chat. The script is currently broken. If the game had a guest talk script during that time, this could be unfair as well.
- All guests that join a game in the iOS/Android version of ROBLOX will wear a roblox jacket and jeans, the 2.0 body, and the ROBLOX 'R' Baseball Cap due to not being able to choose if you want to be a male or female guest in the iOS/Android version.
- From 2008 to 2014, guests were able to speak by using the proper Super Safe Chat words. Now, they can't as that feature has been removed, and they have to create an account to chat. Around the end of 2014, guests were reported to chat normally, which was since patched.
- For a short time, an update was released that introduced a bug in which a user does not receive a knockout point for killing a guest, unlike the normal addition of one point for every player defeated.
- When you open the menu and look for a guest, they will have ROBLOX's avatar look, boy or girl, but in the game, they still look like the current guests. Guests were also able to join Builders Club games. Now, guests are not linked to the ROBLOX account and are linked to BillyBloxxer, BettyBloxxer and DefaultGuest.
- Many users create fake guest accounts (example: Guest123, Guest_8164, Guest10475, etc) and dress like guests. However, many people can identify if they are a guest or not, because users cannot leave spaces in their username. They can also be recognised since guest names do not have underscores and all guests have 1–4 digits in their username. An example can be found here.
- Guests cannot buy items from the catalog.
- Guests used to wear one hat as a male, and the Pinktastic Hair for a female.
- Guests used to wear a straw hat like erik.cassel did on ROBLOX.
- When you hover the mouse over a guest image when viewing game servers, the name will appear as "A Friendly Guest".
- Cookie editors are able to change a guest number by changing the UserID in Guest Data. People may do this for attention, or trolling.
- ROBLOX's user used to look exactly like a male guest, but without a hat.
- When a guest checks their account age, it says their age is 0 unless the guest is online for at least a day.
- ROBLOX stores a cookie on the user's computer that keeps their ID, meaning that ROBLOX does not have to create so many IDs. You are able to change the ID and make the cookie read-only, so when you join the game you can be any number you want. (Guest 1337, Guest 0, etc.)
- A guest cannot access purchasable content in-game, as they are assigned a randomly generated ID.
- It is possible for scripts to ban all guests from a game. However, this violates the terms and conditions, because it makes some guests believe that ROBLOX is a bugged game.
- In Dued1's Work at a Pizza Place, guests are identical to the ones that can be seen in the gender choosing menu. It also has 9 different chats to choose from.
- When playing a guest in the mobile version, the guest's appearance will load DefaultGuest's appearance.
- A bug that occurred on February 2016 let guests send friend requests to users and vice versa. This was patched around March or April.
- In some games with custom chats (example), guests are able to chat.
- It is possible to join a game as DefaultGuest by following a player into a game whilst not being logged in.
- Guests cannot earn ROBUX (or formerly tickets).
- When guests play games that save data (like money), they will lose all their data when they leave.
- In Seranok's Catalog Heaven, guests are given access to the full ROBLOX catalog. Also, when a guest bloxxes you, the user ROBLOX's avatar image shows up on the bloxxed ScreenGui you screen on the bottom.
- In TheFurryFox/VyrissTheVixen's "Survive The Disasters!" game, guests were given a random Dominus, Sparkle Time Fedora, or other valuable limited instead one of the default hats.
- Players absolutely despise Guests for being annoying and not knowing how to play and can sometimes even derail the game angering many players in response.
- Some people use EditThisCookie to rename their guest to Guest 666, thus scaring people into thinking it's the 'Devil Guest'