
Achievement Hunter is an American video gaming division of Rooster Teeth Productions. Founded by Geoff Ramsey and Jack Pattillo on July 6, 2008, the website is largely based on the achievement mechanic found in seventh and eighth generation video game consoles. Since its founding, Achievement Hunter has grown to become a core component of Rooster Teeth, hosting a wide variety of videos related to video games. Achievement Hunter videos are currently hosted by nine main members: Jack Pattillo, Gavin Free, Michael Jones, Lindsay Jones, Jeremy Dooley, Matt Bragg, Trevor Collins, Alfredo Diaz and Fiona Nova.

Alastair Aiken, better known by his online alias Ali-A, is a British YouTuber known for Call of Duty and Fortnite commentaries and vlogs. He is one of the highest-paid professional online gamers. His main channel Ali-A has a subscriber count of over 16 million, with its total views exceeding 4 billion. His second channel, More Ali-A, has a YouTube subscriber count of 5.1 million and a total of over 959 million video views. On 23 April 2018, Ali-A created a new channel, titled "Clare & Ali" with his partner, Clare Siobhan. The channel has since gained over 480,000 subscribers and generated more than 3.5 million video views. In September 2020, he created a fourth channel titled "Ali-A Plays", where he uploads content relating to the Call of Duty franchise only. Currently, the channel boasts more than 184,000 subscribes and more than 1.4 million video views.

Jose Antonio "Joe" Vargas is an American media commentator and YouTuber. He is notable for his portrayal of the character Angry Joe and for his production of the Angry Joe Show, a video game and movie review channel.

Meghan Camarena, known by her online pseudonym Strawburry17, is an American YouTube personality and television host. She has worked on a number of videos, web series, and films, gaining popularity as a YouTube star, and participating as a contestant with fellow YouTuber Joey Graceffa on The Amazing Race 22 and The Amazing Race: All-Stars. She was an on-screen host for video content at Teen.com and was the backstage correspondent for season 2 of the TruTV talent contest Fake Off. in 2017, she and fellow YouTuber Jimmy Wong co-hosted the video game themed variety show Polaris Primetime which was part of Disney's inaugural "D | XP" summer programming block on Disney XD.

Emiliano Rodolfo Rosales-Birou, known as Emile Rosales and best known as Chuggaaconroy, is an American internet personality, YouTuber and prominent Let's Player. He is a founding member of TheRunawayGuys, a collaborative Let's Play YouTube channel, along with fellow Let's Players ProtonJon and NintendoCapriSun.

Jesse Louis Cox is an American YouTube gaming personality, comedian, voice actor, and media commentator. He is the owner of the YouTube channel named OMFGcata, a gaming channel on which Cox posts most of his content. As of January 2018, OMFGcata has over 950,000 subscribers. In the fall of 2016 it was announced that he was co-creating and starring in a new YouTube Red series about a fledgling esports team to be released fall 2017.

Benjamin Richard Croshaw, better known as Yahtzee Croshaw, is a British comedic writer, author, video game journalist, humorist, podcaster, and video game developer. He is best known for his video game review series Zero Punctuation, which he produces for The Escapist. Before this, Croshaw gained attention in the Adventure Game Studio community for his video game production.

Daniel Robert Middleton, better known online as DanTDM, is an English YouTuber, gamer, actor and author known for his video game commentaries. His online video channels have covered many video games including Minecraft, Roblox and Pokémon.

Desmond Daniel Amofah, better known by his online alias Etika, was an American YouTuber, streamer, and model, best known for his over-the-top reactions to Nintendo Direct presentations.

Federico Michael Gaytan, better known by his alias FEDMYSTER, is an American Twitch streamer and YouTube personality. Gaytan is best known for his live streams on the Twitch platform, where he streams his gaming and IRL experiences. He is a former member of OfflineTV, an online social entertainment group of content creators.

Game Grumps is a Let's Play web series hosted by Arin Hanson and Dan Avidan. Created in 2012 by co-hosts Hanson and Jon Jafari, the series centers around its hosts playing video games while adding comedic commentary. After Jafari left the show in 2013 to focus on his own YouTube webseries, JonTron, he was succeeded by Avidan. The YouTube channel for Game Grumps currently operates under JETPAK, a network created by Adam Montoya.

Joseph Mark Garrett, known on YouTube as stampylonghead or stampylongnose, is an English YouTuber, gamer, author, actor, voice actor, and former stop-motion animator. He is known for posting videos about the sandbox video game Minecraft as his internet alias Stampy Cat. In 2014, Garrett's Channel was one of the ten most watched YouTube channels in the world. He has been featured on several television programs with CBBC and Disney.

Joseph Michael Graceffa is an American YouTuber, vlogger, actor, author, producer, and singer. He runs three active YouTube channels, all named after him. His main channel is dedicated to vlogging, while the second features video gaming content. And the third was made only recently for daily vlogs. His channels have a combined total of more than 2.6 billion views. He was a contestant on the 22nd and 24th seasons of The Amazing Race, and has appeared in a handful of short films as well as creating and hosting Escape the Night, an unscripted, unrehearsed web series, distributed by YouTube via its paid-subscription service YouTube Premium. He appears in all four of the seasons with several other YouTubers, including Liza Koshy, Shane Dawson, Colleen Ballinger, and Rosanna Pansino.

Ganbayar Maambayar, better known as Gremix, is a Mongolian YouTuber, known primarily for his comedic formatted shows on YouTube. As of January 2020, his channel has over 93+ million views and over 300+ thousand subscribers, and is ranked the most-subscribed and watched channel in Mongolia. He is the first Mongolian YouTube creator to receive the Silver Play Button.

Seán William McLoughlin, better known as Jacksepticeye, is an Irish YouTuber, best known for his vlogs and comedic Let's Play series. As of March 2021, his channel has over 13.9 billion views and 26.5 million subscribers, and is the most-subscribed Irish channel. He has participated in fundraisers that have raised millions for charity.

Mark Edward Fischbach, known online as Markiplier, is an American YouTuber, gamer-commentator, actor, and comedian. Originally from Honolulu, Hawaii, he began his career in Cincinnati, Ohio, and is currently based in Los Angeles, California. He is also the co-founder of clothing company Cloak, along with fellow YouTuber Jacksepticeye, and the co-host of the now defunct Unus Annus channel.

Felix Arvid Ulf Kjellberg, known online as PewDiePie, is a Swedish YouTuber and comedian, known primarily for his Let's Play videos and comedic formatted shows.

Imane Anys, better known by her online alias Pokimane, is a Moroccan-Canadian Internet personality. As a Twitch streamer and YouTuber, Anys is best known for her live streams on Twitch, broadcasting video game content, most notably in League of Legends and Fortnite. She is a member of OfflineTV, an online social entertainment group of content creators.

The Sidemen is a British YouTube group comprising KSI, Miniminter, Zerkaa, TBJZL, Behzinga, Vikkstar123 and W2S. The group is best known for its various YouTube channels, which have a combined total of around 16 million subscribers, as of February 2021.

Smosh is an American sketch comedy YouTube channel created by Anthony Padilla and Ian Hecox. In 2002, Padilla created a website named "smosh.com" for making flash animations, and he was later joined by Hecox. They began to post videos on Smosh's YouTube channel in the autumn of 2005 and quickly became one of the most popular channels on the site. As of May 2019, the Smosh channel has over 9.5 billion video views and over 25 million subscribers, putting it just outside of the top 50 most subscribed channels on YouTube, after having previously spent 3 separate periods as the most subscribed channel on the platform.

Rachel Hofstetter, better known by her online alias Valkyrae, is an American internet personality. The recipient of a Game Award, she is best known for her livestreams on YouTube, being one of the most viewed streamers on the platform. She is also a content creator for 100 Thieves, an esports team, and an activist towards females in online gaming.

James Franklin Wong is an American actor and musician. He is best known for his 2011 music video, "Ching Chong: Asians in the Library Song" and for his role as Ted in the web series Video Game High School. In 2017, he and YouTuber Meghan Camarena co-hosted the video game themed variety show Polaris Primetime, which was created as part of Disney's "D|XP" programming block on Disney XD.