Citadel (Unofficial Port)
by Raguto
With Citadel installed, mods that depend on it can share its library code, and this NeoForge port of the library runs on Minecraft 1.21.1 only.
What it does
Citadel is a library mod. It provides shared code and functions that other mods call, so it adds no items or blocks on its own. Four catalog mods require it, including Alex's Mobs (Unofficial Port), Alex's Caves (Unofficial Port), Fly High and Untamed Wilds (Unofficial Port). Citadel must be installed for any of them to start.
This unofficial port brings Citadel to the NeoForge loader for Minecraft 1.21.1. Files are published for NeoForge only, with 2.7.6 for 1.21.1 as the latest build, first released on 2025-12-29 and last updated on 2026-04-25. The port is community maintained and not affiliated with the original Citadel developers. The original mod was written by AlexModGuy with other contributors, and the code is open source under the GNU Lesser General Public License v3.0 only.
Both the server and every player need the mod, because it runs on client and server alike. Because it is a library, nothing appears in the game until a dependent mod uses it.
Key features
Shared library code
Other mods call Citadel for functions they share, so one installed copy serves several dependent mods.
Required by dependent mods
Alex's Mobs, Alex's Caves, Fly High and Untamed Wilds each need Citadel present to load.
Port of an existing library
This community build carries the original library code over so that dependent mods can load in the newer game build.
Compatibility
Latest build for each game version and loader.
Only full game releases are shown. This mod publishes no snapshot builds.
Required by 4 mods
Use cases
Running Alex's Mobs on NeoForge
Players who want Alex's Mobs (Unofficial Port) on NeoForge 1.21.1 install Citadel alongside it, since that mod depends on the library.
Running Fly High
Fly High also depends on Citadel, so the library is installed on the same 1.21.1 NeoForge setup.
Who it’s for: Players and server owners who run one of the four dependent mods on NeoForge 1.21.1 need this library. Modpack authors who include those mods need it in the pack as well.
Questions
Does Citadel need to be installed on the server?
Which mods require Citadel?
Which Minecraft version does this port support?
In the catalog
Citadel (Unofficial Port) is one of 3,514 Library mods on ModsFinder, and one of 1,449 Library mods for NeoForge. 32,366 mods support Minecraft 1.21.1.
More from Raguto
Similar mods
What the author says
About This Port: This port updates Citadel to work with Minecraft 1.21.1 and the NeoForge mod loader. This is a community-maintained port and is not officially affiliated with the original Citadel developers. Original Mod: Citadel by AlexModGuy and contributors.
Official listing
- Modrinth page
- modrinth.com/mod/citadel-1.21.1-port
- Owner
- Raguto
- Published
- 2025-12-29
- Updated on Modrinth
- 2026-04-25
- Facts verified
- 2026-10-15