Acheron is a 2.1 Extreme Demon mega-collaboration hosted by Ryamu and Riot, published by Ryamu, and verified by Zoink on August 23, 2022, after 72,808 attempts.[1] It was originally set to be verified by Wolvez, who achieved 96% and 92% x2[2] before dropping the level on April 7, 2022, leaving the level with an open verification. The level features a dark and intimidating theme containing colors such as black and gray, mixing in a bit of red. Many members of the community believed that Acheron was the sequel to Tartarus (the level that inspired Acheron and its 1.9-styled decoration); however, this was a misconception, as Acheron was meant to be a stand-alone level.