Marco Túlio (AuthenticG_ames, known on YouTube as AutheticGames) is a Brazilian Roblox Youtuber with over 18M subscribers. He primarily uploads gameplay videos based on Roblox and Minecraft.
His Roblox account has over 157K followers. His avatar consists of Blue 8-Bit Headphones, Beautiful Brown Hair for Beautiful People, and Shiny Teeth.
He often uses clickbait thumbnails for his YouTube videos. Like DrTrayblox, many Brazilian Roblox veterans have criticized him for introducing his young audience to Roblox.