Kotlin for Forge Unofficial Extended Support

Kotlin for Forge Unofficial Extended Support

Adds a Kotlin language loader and provides some optional utilities, for 1.16.5

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About this Mod

This is unofficial version for Miecraft 1.16.5 . This provides latest Kotlin libraries to 1.16.5. If you want use original version, visit here


Used to make mods with the Kotlin programming language. Works by shading the Kotlin libraries, providing KotlinLanguageProvider to load @Mod object declarations, providing AutoKotlinEventBusSubscriber to load @EventBusSubscriber declarations, and providing useful utility functions and constants.

As of Kotlin for Forge 1.8.0, this provides Kotlin 1.4.21, Kotlin coroutines 1.4.2, Kotlin JSON serialization 1.0.1, and Jetbrains annotations 20.1.0.

If you're not a mod developer, this is a dependency mod.

Unlike Kottle, this library (as of 1.2.0) provides its own implementation of IEventBus that supports IEventBus#addListener and IEventBus#addGenericListener with function references.

Information for how to implement can be found here. You do not have to use the language loader or any of the features Kotlin for Forge provides, you can just use it for the bundled Kotlin libraries.

Available Versions

Kotlin for Forge Unofficial Extended Support 1.18.0-2.1.10release
MC 1.16, 1.16.1, 1.16.2, 1.16.3, 1.16.4, 1.16.5forge
April 18, 2025
Kotlin for Forge Unofficial Extended Support 1.18.0-2.0.21release
MC 1.14, 1.14.1, 1.14.2, 1.14.3, 1.14.4, 1.15, 1.15.1, 1.15.2, 1.16, 1.16.1, 1.16.2, 1.16.3, 1.16.4, 1.16.5forge
April 6, 2025

How to Install Kotlin for Forge Unofficial Extended Support on Your Server

1

Order Server

Order a Minecraft Java server with at least 3 GB RAM (4 GB recommended).

2

Set forge Loader

In the panel under "Egg", select the forge loader and matching Minecraft version (1.16.5).

3

Install Mod

Open the mod browser in the dashboard and search for "Kotlin for Forge Unofficial Extended Support". Click "Install" – done! Alternatively, upload the .jar via SFTP to the /mods folder.

Compatibility

Mod Loaders

forge

Minecraft Versions

1.16.5, 1.16.4, 1.16.3 (+11 more)

Server-side

Unsupported

Recommended RAM

4 GB(min. 3 GB)

Frequently Asked Questions

Kotlin for Forge Unofficial Extended Support 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 3 GB RAM is allocated and the loader matches the mod version (1.16.5). You can switch loaders with one click in the panel.

Is Kotlin for Forge Unofficial Extended Support compatible with forge?

Kotlin for Forge Unofficial Extended Support officially supports forge for Minecraft 1.16.5, 1.16.4, 1.16.3. The Mado dashboard automatically detects incompatible loader combinations.

Server lagging with Kotlin for Forge Unofficial Extended Support – how to optimize performance?

Recommended RAM: 4 GB (per 8 players). Use /spark profiler to check if Kotlin for Forge Unofficial Extended Support 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.

Rent Modded Server

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Recommended RAM
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Min. 3 GB | +1 GB pro 8 Spieler
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NVMe SSD Storage
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Details

License
GNU Lesser General Public License v2.1 only
Server-side
Unsupported

Supported Versions

1.16.51.16.41.16.31.16.21.16.11.161.15.21.15.11.151.14.4+4 more