Hi Developers, I make a system to calculate your Roblox account rarity.
It works like this:
The system takes the number of the most recently created Roblox account, and then takes your account number and calculates how many percent your number is based on the most recent Roblox account.
Example:
If the most recent Roblox account was account number 6 billion (6,000,000,000), and your account is account number 3 billion (3,000,000,000), then your account will have a rarity of 50%.
In the game I’ve added some rarities for specific percentages, here’s a list of them:
COMMON < 100%
UNCOMMON < 80%
RARE < 50%
EPIC < 25%
LEGENDARY < 5%
MYTHIC < 1%
ANCIENT < 0.5%
BROO OOMMGG 
< 0.1%
(You can also search for other users’ IDs within the game)
I hope you enjoy it! (I’ll add badges for each rarity in the future)