Part 0: Codi
Trailhead the First
On 2016-03-17, a post appeared on /r/gamedetectives saying that Teragon Group's website had changed. Six hours later, Discord user VintageKeith checked the page and found that it was hacked by an entity named Codi.
Four hours later, the site reverted to its usual look.
The next day this video appeared on the channel, with the description saying it was "sponsored by Codi". The game shown in the video is *Stardew Valley*, and this channel was discovered through this hint.
A Warm Welcome
The video Hi There drew attention as it was the newest one and different to the others. The text said:
Hi there. My name is Codi. Do you want to know me? Let’s see if you're smart enough. Solve this riddle. [Mirrored] See you on the other side.
The video itself is flashing images of asterisks.
The first video is the Star Spangled Banner (American national anthem), and the second one is Twinkle Twinkle.
IT'S STAAAARS YOU FOOLS!
Constellations & Team Fortress 2
Using all previous hints this blog was discovered by spelling Camelopardalis backwards.
However, the ARG was put on hiatus - read more here.
Don't Stop Me Now
Roughly eight hours after the ARG went on hiatus, nserubetclu was spelled out by Discord chat user VintageKeith from the first letters of the maps, leading to /r/turbulences.
On April 5th 2016, 15 days after the cancellation of Teragon 2/Codi, the reddit user /u/TonyWan started posting in the League of Legends and DoTA 2 subreddits. This is interesting because Tony Wan is a character from the first Teragon ARG.
The DoTA 2 post was a link to a Twitch channel called "thehiddenmessage". It showed the DoTA hero select screen with a robotic voice reading out Buddhist transcripts.
The LoL post linked to a website claiming to have secret information on certain teams from popular eSports games.
People's ARG senses were tingling, especially with the link to Teragon. More investigation was done on the website and Twitch stream which led to more discoveries, somewhat confirming an ARG.