Nextbots began as player-made chasers in Garry's Mod, flat images that slide toward players while playing loud sounds, and the format exploded through Nico's Nextbots on Roblox and clips on YouTube and TikTok. Entity 666 is one of the darker fan variants, using the number 666 to signal a demonic, cursed character. Its short chase sound spread because it is easy to recognise, easy to edit in, and instantly changes a normal clip into a horror meme, so creators still reuse it for parodies, gameplay edits and jumpscare compilations.