
Fathom Mod
Fathom mod is an action adventure style mod heavily inspired by terraria's calamity mod, terraria itself and ultrakill, to an extent.
Screenshots




About this Mod
tldr:
- 9 weapons
- 3 weapon classes
- 18 trinkets
- 1 boss
- 1 biome + 1 mob in it
Long description
Inspired from Terraria, Fathom Mod adds 3 weapon classes: Melee, Ranged and Assassin with 9 new weapons to choose from. Another thing inspired by terraria was the addition of "trinkets" which are equippables that, for now, passively help the player which have their own ui. Note: some things in vanilla have been tweaked for balancing purposes
What to expect
"Blood Moon Harvest" update expected to come out some time in june/july (delayed due to school and scopecreep)
Expected content in Blood Moon Harvest:
- 5 weapons
- 5 trinkets
- 3 crafting materials
- World events
- New weapon class
- Blood river entities
- Balance changes
- Possible changes to old things
- Changes to the trinket gui
- Permanent buffs
- Test world
- More stuff
Preview of one of the weapons

Preview of trinkets

Available Versions
How to Install Fathom Mod on Your Server
Order Server
Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).
Set neoforge Loader
In the panel under "Egg", select the neoforge loader and matching Minecraft version (1.21.4).
Install Mod
Open the mod browser in the dashboard and search for "Fathom Mod". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.
Compatibility
Mod Loaders
Minecraft Versions
1.21.4, 1.21.3, 1.21.1 (+1 more)
Server-side
✓ RequiredRecommended RAM
4 GB(min. 3 GB)Frequently Asked Questions
Fathom Mod server crashes on startup – what to do?
Most common cause: wrong neoforge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 3 GB RAM is allocated and the loader matches the mod version (1.21.4). You can switch loaders with one click in the panel.
Is Fathom Mod compatible with neoforge?
Fathom Mod officially supports neoforge for Minecraft 1.21.4, 1.21.3, 1.21.1. The Mado dashboard automatically detects incompatible loader combinations.
Server lagging with Fathom Mod – how to optimize performance?
Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Fathom Mod consumes the most tick time. Common fixes: reduce server view-distance to 8-10, install "performant" or "starlight" as supplementary mods on Forge. With Mado Hosting, your server runs on NVMe SSDs with dedicated CPU cores for minimal latency.
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Rent Modded Server
Install Fathom Mod with just one click on your server.