Slaughterhouse is an Extreme Demon 2.1 hosted by Icedcave and verified by Doggie. It is based on the old icedcave impossible level of the same name.
True Unnerfed is Slaughterhouse's first version. It is also the hardest version of this level. It is still unverified.
Unnerfed was released about a week after the true unnerfed version. This version significantly reduces the difficulty of the waves compared to the first version.
Doggie Slaughterhouse is the first version used for verification. This version differs significantly from the Unnerved version. Instead of focusing on difficulty, this version focuses on player excitement.
The raced version is quite similar to the unnerved version. It was verified by wPopoff on October 8, 2023.
The current version is the same as the racing version, but some minor nerfs have been added.