Case study

LunarCore: reimplementing a Star Rail 4.2.0 game server

LunarCore is a Java reimplementation of the Star Rail game server for a 4.2.0 client. ./gradlew jar builds LunarCore.jar, and java -jar LunarCore.jar starts it. The resources directory needs the Config, TextMap, and ExcelBin folders from the StarRailData set. Java 21 is required. The server can use its built-in database, and the README also recommends MongoDB 4.0 or newer. Login, teams, inventory, monster battles, shops, gacha, mail, Forgotten Hall, Pure Fiction, and a partial Simulated Universe are listed as present.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-07

Stars: 1.4k
Last commit: 2026-05-27
Language: Java
License (GitHub): AGPL-3.0

GitHub data as of 2026-11-10

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Requirements & limits

Java 21. Place the Config, TextMap, and ExcelBin folders in resources, then run ./gradlew jar.
The README names no license.

Cite

BibTeX

@misc{lunarcore,
  title = {{LunarCore: reimplementing a Star Rail 4.2.0 game server}},
  howpublished = {\url{https://github.com/Melledy/LunarCore}},
  url = {https://github.com/Melledy/LunarCore},
  urldate = {2026-11-07},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/lunarcore/}}
}

Plain text

LunarCore: reimplementing a Star Rail 4.2.0 game server. https://github.com/Melledy/LunarCore (accessed 2026-11-07). Awesome REA entry: https://awesomerea.org/resources/lunarcore/

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Primary sources

README.md GitHub · Melledy/LunarCore · Revision 04b5de8