How to Host a Compact Claustrophobia Server
Compact Claustrophobia is HenryLoenwind's expert modpack for NeoForge 1.19.2, and it flips the usual expert-pack formula: instead of starting in an open world or on a void skyblock island, you begin locked inside a tiny 2×2 room that only grows as you complete quests and unlock new blocks and mod access. That unique premise means your server needs to boot cleanly into its quest systems from the very first tick, not just load a world. Here's how to get a Compact Claustrophobia server running correctly instead of fighting NeoForge config errors on your own hardware.
Start with 6 GB of RAM as your floor — that's the recommended minimum for Compact Claustrophobia's own modlist, covering NeoForge 1.19.2, the quest book, and the machinery mods you unlock as your room expands. Going lower risks crashes right as you're trying to break out of the starting room.
Import the modpack directly from its CurseForge or Modrinth listing instead of re-zipping a client export. A clean import pulls the matching NeoForge 1.19.2 version and the correct server-side mod jars automatically, so you're not guessing which files actually belong on the server.
Watch the console through first boot until the world generates and the quest system initializes. Compact Claustrophobia's expanding-room mechanic depends on quest data loading correctly before anyone logs in, so a clean finish in the log matters more here than in a typical expert pack.
Only invite players once you've confirmed first boot completed without errors and the starting 2×2 room actually loads. Since the whole pack hinges on the room-expansion sequence working from quest one, a broken first boot blocks everyone's progress at the same point.
Take a backup before any world import, NeoForge update, or config change. Every quest completion permanently bakes a room expansion into the save, so losing that progress means redoing the entire sequence of room unlocks from scratch.
Use a cleaner Compact Claustrophobia path
CoalHost is built around modpack hosting, which makes Compact Claustrophobia much less annoying to launch correctly.
Deploy Compact Claustrophobia now →