|Riley Aries George|
|The Consortium: Gaming Channel|
OctoBarian is a Canadian YouTuber, and one of Markiplier's first YouTube friends. Their only collaboration was Serious Sam 3 Let's Play a long time ago on Mark's old channel. Currently, he's an admin of the Steam official group Markipliers Maniacs. Also, he hosts a channel where he makes playthroughs with his friend Duncan Edwards. In March 2nd, 2014, "Octo Inc." has bought British Joe&Jack Gaming (Joe Hesketh and Jack Rhodes) and merged into The Consortium Let's Play channel.
They also invited friend Megan Jones for a couple of times for horror games. Other guests on the channel have included, James (Xternel/Babysushi), Shaun (Poramo), Wats, and other various girlfriends.
|Fischbachs||Mark Fischbach | Tom | Sunok | Cliffton Fischbach | Dee | Chica | Buddi|
|Aaron Ash | Amy Nelson | Bob Muyskens | Cyndago (Daniel Kyre • Matt Watson • Ryan Magee) | Ethan Nestor | George Barnes (Wade) | Kathryn Knutsen | Sean McLoughlin | Tyler Scheid|
|Recurring Collaborators||Brooke Lawson | CinnamonToastKen | Cryaotic | EatMyDiction1 | Fine Brothers | Game Grumps | Jesse Busemeyer | Jordan Maron | Latin Goddess | LixianTV | Matthias | PewDiePie | Rosanna Pansino | SeaNanners | TheRPGMinx | Zombiemold | Ohmwrecker|
|Others||Jessica Fossey | Caspie1405 | Coyotemation | Cranbersher | Crown Interactive | DidYouKnowGaming? | Dlive | Edge | Hot Pepper Gaming | jacksfilms | JeffKyler14 | markiplierSINGSbadly | MatPat | Octobarian | Polaris | RadicalSoda | Random Encounters | shodleech | Sienna Spalding | SuperMega | Tobygames | Triggerhappy1337 | UberHaxorNova|