# RS Mod: RuneScape server-mechanics reconstruction

> RS Mod reconstructs RuneScape game-server behavior in Kotlin, with the goal of matching the original mechanics. Its documentation recommends RSProx to inspect client-server packets while developing and checking those mechanics, and the repository contains server, cache and gameplay modules.

- Type: Case study
- Targets: Game
- Category: Independent reconstruction cases
- Relationship: Independent reconstruction project
- Sources reviewed: 2026-11-06
- Added to the catalog: 2026-11-09
- Original resource: <https://github.com/rsmod/rsmod>
- Primary source: <https://github.com/rsmod/rsmod/blob/fa13b3f67172ef36e15d6b1514358aee61411796/README.md>
- Catalog page: <https://awesomerea.org/resources/rsmod-runescape-case/>
- Record JSON: <https://awesomerea.org/resources/rsmod-runescape-case/record.json>
- Chinese version: [简体中文](https://awesomerea.org/zh/resources/rsmod-runescape-case/index.md)

## Requirements & limits

- **Prerequisites:** Java 21 or later.
- **Prerequisites:** The first server run downloads required game files.
- **Limits:** The project describes itself as still in its early stages.
- **License:** ISC licence.

## Primary sources

1. <https://github.com/rsmod/rsmod/blob/fa13b3f67172ef36e15d6b1514358aee61411796/README.md>

## More in Games

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- [Sapphire: a reconstructed FINAL FANTASY XIV 3.3 server](https://awesomerea.org/resources/sapphire-ffxiv-server-case/index.md) · Case study
- [Sargon III: recovering move order and its opening-library encoding](https://awesomerea.org/resources/sargon-iii-disassembly-case/index.md) · Case study

## About this entry

The description was reviewed against primary sources.
Original editorial content: MIT. Linked projects, papers and assets retain their own rights and licenses.