# Grasscutters/Grasscutter

A server software reimplementation for a certain anime game.

Repository: https://github.com/Grasscutters/Grasscutter
Canonical: https://ross.abutalabs.com/products/grasscutter
Homepage: https://grasscutter.io/
Language: Java
License: AGPL-3.0
License Family: copyleft
Topics: java, kcp, server, private-server
Last push: 2026-03-04T02:54:53+00:00

## Health v2 (maintenance only)
Score: 54/100 (v2, computed 2026-09-02T17:46:02.011165+00:00)
- activity 70, release rhythm 8, longevity 100
- inputs: {"age_days": 1599, "days_push": 182, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 16807, forks 4286 (observed 2026-08-28T04:11:17.304758+00:00)

## What it is
Grasscutter is a Java-based server software reimplementation for a certain anime game, allowing users to run their own private game server. It supports features like login, combat, gacha, teleportation, and inventory management, and works with game client version REL4.0.x.

## Use cases
- run a private server for an anime game
- host a local game server for offline play
- test game features like gacha and combat on a private server
- spawn monsters and manage inventory via console commands
- play co-op with friends on a self-hosted server

## When to choose
- you want to self-host a private game server for version REL4.0.x
- you want to experiment with game mechanics like gacha or spawning monsters
- you want a Java-based, open-source server reimplementation you can modify

## When to avoid
- you need support for game versions newer than REL4.0.1
- you expect active maintenance or official support
- you want a production-ready, fully featured co-op experience

## Facets
- artifact type: service
- maturity: maintenance
- function: http-server, networking, game
- domain: gaming-tools, self-hosted, simulation
- platform: jvm, cross-platform, self-hosted
- tags: private-server, game-server, kcp, genshin-impact, server-emulation, reverse-engineering

## Member repositories
- Grasscutters/Grasscutter (main) score 54

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:11:17.304758+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:04:15.095204+00:00, confidence not recorded.
  - readme: https://github.com/Grasscutters/Grasscutter (fetched 2026-08-28T04:11:17.304758+00:00, sha 664ebd5c8239)
  - homepage: https://grasscutter.io/ (fetched 2026-08-29T08:01:49.117439+00:00, sha b2d319d9d62c)
- Data as of 2026-08-30T08:39:29.467469+00:00.