Compatibility Update 9, Feature Update 16 for Forge and Paper 1.18.X is a release file of the Minecraft mod Gehenna | Super Spooky Nether Overhaul for Forge & Paper for Forge, made for Minecraft 1.18.1. It was published on March 2, 2022 and is 2 MB in size. For the full description, screenshots and every other version, visit the Gehenna | Super Spooky Nether Overhaul for Forge & Paper mod page.
How to install: Put the .jar into the mods folder (.minecraft/mods) and start Minecraft with the matching mod loader profile.