Lost River

Minecraft mod adding experience from Subnautica

16.5K Downloads

forgeneoforgeadventuremobsworldgen

Rent Server with this Mod

Screenshots

About this Mod

Important! Version 1.21.1 lacks many features from version 1.20.1

Lost River is an exciting Minecraft mod that takes players to the mysterious and dangerous planet 4546B from the game Subnautica. Immerse yourself in an unforgettable underwater adventure, exploring the endless depths of the ocean, full of dangers and unexplored secrets.

To get into the dimension of planet 4546B you need to build such a portal, just like the portal to the nether

Available Versions

Lost River 1.0.0-beta5beta

MC 1.21.1neoforge

February 16, 2025

Lost River 1.0.0-beta4beta

MC 1.21.1neoforge

February 12, 2025

Lost River 1.0.0-beta3beta

MC 1.20.1forge

August 20, 2024

Lost River 1.0.0-beta2beta

MC 1.20.1forge

August 18, 2024

Lost River 1.0.0-beta1beta

MC 1.20.1forge

August 15, 2024

How to Install Lost River on Your Server

Order Server

Order a Minecraft Java server with at least 4 GB RAM (6 GB recommended).

Set forge Loader

In the panel under "Egg", select the forge loader and matching Minecraft version (1.21.1).

Install Mod

Open the mod browser in the dashboard and search for "Lost River". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

forgeneoforge

Minecraft Versions

1.21.1, 1.20.1

Server-side

✓ Required

Recommended RAM

6 GB(min. 4 GB)

Frequently Asked Questions

Lost River server crashes on startup – what to do?

Most common cause: wrong forge version or insufficient RAM. Check the server log (latest.log) for "OutOfMemoryError" or "Mixin" errors. With Mado Hosting: ensure at least 4 GB RAM is allocated and the loader matches the mod version (1.21.1). You can switch loaders with one click in the panel.

Is Lost River compatible with forge and neoforge?

Lost River officially supports forge, neoforge for Minecraft 1.21.1, 1.20.1. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Lost River – how to optimize performance?

Recommended RAM: 6 GB (per 5 players). Use /spark profiler to check if Lost River 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.