|A rabbit hole of puzzles across the GameDetectives community.|
76543 was an ARG that began with a post to /r/gamedetectives and continued through a chain of puzzles. Its creator and purpose are unknown.
The 76543 ARG was designed for the GameDetectives Community. It first appeared on the subreddit, after /u/ARG76543 posted a text post describing their group, and outlining that we would need a PGP Key to get our first clue. The encoded text in the post was Vigenere decoding with "arg seven six five four three" to a description of William Shakespeare, which user NickForAll found out was our key password. Using "Shakespeare" as our pastword, we were able to unlock another clue, which was an extract from Pslams, the third section of the hebrew bible. It didn't make much sense until users Crauss and Deiru were able to determine that the string of numbers along the bottom correspond to a letter's position in the alphabet. When decoded the message refers to multiplying prime numbers. 2, 3, 4, 9 and 76543 (the poster's username). 4 and 9 aren't primes, so after multiplying the rest it gives 459258, which was the clue to a Twitter account. This twitter account had a darkened image, which when lightened, revealed a QR Code.
A bot called argbot appeared in the off-topic voice channel, and would play pre-recorded sound-bites when given a certain key. For example, when given the key ??Patience, it would play Rick Astley's Never Gonna Give You Up.