Xanii accepted the request and got to work on the level immediately. His first thought was to ask Xanii, as he had just verified Sonic Wave Infinity, and he had achieved a run of 30-49% on the unnerfed version of Slaughterhouse a month earlier. After a bit of time, IcEDCave finished nerfing the level, and he then had to obtain a verifier for the level. IcEDCave decided to nerf the entire level down to a Top 5 Extreme Demon so the level could get verified and placed on the Geometry Dash Demonlist. IcEDCave made the decision to nerf River's part in the published version of the level, but the level was still considered way too hard. However, the level was too hard to be verified, with some stating the level was harder than unnerfed Silent Clubstep. Top players would get considerably good runs on the level, with Kurumi getting runs of 0-20%, 30-50%, 58-74%, and 82-100%. Many players got to work on the level straight away.

As planned, the finished level premiered on April 30, 2021. Ten days later, IcEDCave would release the final preview of the level, showcasing CDMusic's final cube and then proceeding to show the numbers '.' indicating that the finished level would be released on April 30, 2021. Seemingly out of nowhere, on April 3, 2021, River uploaded his decorated part in the level. This is due to the fact that a lot of IcEDCave's other levels gained more traction, such as levels like Diamond Blade, Final Destination, and Hypnosis. After the second and a half preview, the level somewhat died down a bit, with less progress being made over time. On August 18, 2020, a second and a half preview of the level premiered on IcEDCave's YouTube channel, with the new version of the song and botted gameplay by Xanii. IcEDCave also got permission to use the song by one of XVA's members. He and EndLevel made a remastered version of the song, with the gunshot- and explosion sounds taken out, and remade it from scratch, with the exception of the glitch sound at the end. This led to IcEDCave privating the two previews of the level.

IcEDCave took the audio for the level from a CS: GO montage, which caused confusion because when people tried to find the song for the level, they would find the CS: GO edit of the song, go into the comment section, and spam variations of 'WHO'S HERE FROM SLAUGHTERHOUSE!?!', etc. These two previews have since been set to private by IcEDCave, but they were reuploaded on SKOE99's channel. The first two previews of Slaughterhouse were posted on IcEDCave's YouTube channel in May-June 2020. The first known video of the level was posted to YouTube on July 6, 2019. SpaceUK won the race, verifying the level on October 24, 2021. A possible version of the level was in the process of verification, which was a race between SpaceUK, Raevez, Xanii, Trick, Photonic, and Zamasu. It is a new version of IcEDCave's old impossible level of the same name, which he created out of dissatisfaction, as IcEDCave was ashamed of what the level was and that it was the only thing he felt that he was known for.

Slaughterhouse is a 2.1 Extreme Demon mega-collaboration created by IcEDCave, EndLevel, River, Iris, DrCuber, CDMusic, and Brittank88 and verified by SpaceUK. IcEDCave, EndLevel, River, Iris, DrCuber, CDMusic, and Brittank88 (Verified by SpaceUK)

Geometry dash mp3 download all songs