A non-exhaustive list of free custom server backend implementations for various online games that can be self-hosted.
This list is partially inspired by awesome-selfhosted, go check them out for cool self-hosted goodies!
Contributions are always appreciated, check the Contributing section for more details!
This list is only for free software. For others, check out Extras.
- Contents - basic details
- General - game-agnostic software
- Games - software for specific games
- Among Us (2018)
- Arcaea (2017)
- Arknights (2019)
- Arknights: Endfield (2026)
- Azur Lane (2017)
- Blue Archive (2021)
- Command & Conquer: Red Alert (1996)
- Dragalia Lost (2018)
- Escape from Tarkov (2025)
- Goddess of Victory: Nikke (2022)
- Genshin Impact (2020)
- Honkai Impact 3rd (2016)
- Honkai: Star Rail (2023)
- Minecraft (2009)
- NieR Re[in]carnation (2021)
- osu! (2007)
- OverField (2025)
- Punishing: Gray Raven (2019)
- Ragnarok Online (2002)
- Reverse: 1999 (2023)
- Stella Sora (2025)
- Wuthering Waves (2024)
- Zenless Zone Zero (2024)
- World Flipper (2019)
- World of Warcraft (2004)
- Contributing - appreciate it!
Different server implementations will be categorized by the games that they're used for, sorted in alphabetical order. Each individual entries are listed with a maintenance status indicator, the name of the software with a link to its Git repository, the language used to develop said software, and its license.
| Maintenance Status | Indicator | Description |
|---|---|---|
| Active | 🟩 | Actively developed. |
| Maintenance-only | 🟧 | Bug fixes only. |
| Archived | 🟥 | Discontinued. |
Caution
We do not aim to provide guidance on how to utilize any of the projects listed here. We are not in any way affiliated or associated with any of the listed projects.
- 🟩 Pretendo
Multiple languages/AGPL-3.0- Open source Nintendo Network replacement server for the WiiU and 3DS
Note
Developed and published by Innersloth.
- 🟩 Impostor
C#/GPL-3.0
Note
Developed and published by Lowiro.
- 🟩 Arcaea-server
Python/MIT
Note
Developed by Hypergryph. Published by Hypergryph in China, Gryphline in Taiwan, and Yostar worldwide.
- 🟥 OpenDoctoratePy
Python/GPL-3.0 - 🟩 OpenBachelorS
Python/ARR
Note
Developed by Hypergryph. Published by Hypergryph in China, Ariel in Taiwan, Hong Kong and Macau, and Gryphline worldwide.
- 🟥 S
Zig/AGPL-3.0 - 🟩 perlica-rs
Rust/AGPL-3.0
Note
Developed by Manjuu. Published by Bilibili in China, XD Global in Korea, PWB Play in Taiwan, Hong Kong and Macau, and Yostar worldwide.
- 🟥 Belfast
Go/GPL-3.0
Note
Developed by Manjuu. Published by Yostar and Nexon. This game has not started official service yet.
- 🟥 AzurPromiliaPS
C#/ARR - 🟥 Zetsa
Zig/AGPL-3.0
Note
Developed by Nexon Games/MX Studio. Published by Yostar in China and Japan, and Nexon worldwide.
- 🟥 Atrahasis (archived)
C#/ARR - 🟥 BaPs
Go/ARR
Note
Developed and published by Westwood Studios (now Electronic Arts).
- 🟩 OpenRA
C#/GPL-3.0
Note
Developed by Cygames. Published by Nintendo. This game had reached End of Service since November 2022.
Note
Developed and published by Battlestate Games.
- 🟥 Single Player Tarkov
TypeScript/NCSA- 🟩 C# Rewrite
C#/CC-BY-NC-SA-4.0
- 🟩 C# Rewrite
Note
Developed by Shift Up. Published by Level Infinite.
- 🟩 EpinelPS
C#/AGPL-3.0
Note
Developed by miHoYo. Published by miHoYo in China and HoYoverse worldwide.
- 🟥 Grasscutter
Java/AGPL-3.0 - 🟩 KazusaGI_cb2
C#/MIT - 🟥 hk4e-go
Go/Apache-2.0
Note
Developed by miHoYo. Published by miHoYo in China, Nijigen Games in Taiwan, Hong Kong and Macau, Funtap in Vietnam, and HoYoverse worldwide.
- 🟥 KianaBH3
C#/ARR - 🟩 PemukulPaku
C#/ARR
Note
Developed by miHoYo. Published by miHoYo in China, Nijigen Games in Taiwan, Hong Kong and Macau, 3T Online in Vietnam, and HoYoverse worldwide.
- 🟥 DanhengServer
C#/AGPL-3.0(available fork) - 🟩 KazusaHSR_0.56
C#/AGPL-3.0 - 🟥 Eileen-SR
Zig/ARR - 🟥 LunarCore
Java/AGPL-3.0 - 🟥 YaoGuangSR
Zig/ARR
Note
Developed and published by Mojang Studios.
- 🟩 Pumpkin
Rust/MIT - 🟩 FerrumC
Rust/MIT - 🟩 PocketMine-MP
PHP/LGPL-3.0
Note
Developed by Applibot. Published by Square Enix. This game had reached End of Service since April 2024.
- 🟩 Lunar Tear
Go/MIT
Note
Developed by ppy and the osu! development team.
- 🟩 Sunrise
C#/MIT - 🟧 bancho.py
Python/MIT - 🟩 Titanic
Python/MIT - 🟩 g0v0-server
Python/AGPL-3.0
Note
Developed and published by INUTAN Limited.
Note
Developed and published by Kuro Games.
Note
Developed and published by Gravity.
- 🟩 rAthena
C/GPL-3.0
Note
Developed and published by Bluepoch.
- 🟩 sonetto-rs
Rust/ARR
Note
Developed and published by Yostar.
- 🟩 Nebula
Java/AGPL-3.0
Note
Developed and published by Kuro Games.
- 🟥 Wicked Waifus
Rust/AGPL-3.0 - 🟩 Zigrika
Zig/ARR
Note
Developed by miHoYo. Published by miHoYo in China and HoYoverse worldwide.
- 🟩 Yoshunko
Zig/AGPL-3.0
Note
Developed and published by Cygames. This game had reached End of Service since July 2024.
- 🟥 Starpoint
TypeScript/GPL-3.0
Note
Developed and published by Blizzard Entertainment.
- 🟩 TrinityCore
C++/GPL-2.0 - 🟩 AzerothCore
C++/GPL-2.0 - 🟩 C-MaNGOS
C++/GPL-2.0(WotLK branch)
There are multiple ways you can contribute: adding new project entries, correcting my mistakes, or simply just tidying things up.
The goal of this list is to eventually become a comprehensive catalog of everything private server and online game revival project related. However, we want this to be a curated list of high quality software, so there are some requirements for projects to be accepted into the list, notably they:
- MUST have their source code in an easily accessible and reproducible form
- MUST be unofficial implementations written from the ground up
- MUST have at least some degree of functionality
If one or more projects hold enough significance to warrant their addition, they may be considered to be added to the Extras list instead.
We do not accept paid and/or gatekept projects, and you should not support such projects either.
When adding entries, you should reference how existing ones are written to ensure consistency and accuracy.
If you have any questions, feel free to create an issue. If you have anything neat to add to the list, open a pull request!