# Card-Forge/forge

An unofficial rules engine for the world's greatest card game.

Repository: https://github.com/Card-Forge/forge
Canonical: https://ross.abutalabs.com/products/card-forge-forge
Homepage: https://card-forge.github.io/forge/
Language: Java
License: GPL-3.0
License Family: copyleft
Topics: ai, magic-the-gathering, quest, rules-engine, adventure, android, java
Last push: 2026-08-26T19:27:58+00:00

## Health v2 (maintenance only)
Score: 94/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 84, longevity 100
- inputs: {"age_days": 1607, "days_push": 7, "days_rel": 25, "gap_med": 46, "n_releases_24m": 16}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2638, forks 1050 (observed 2026-08-28T04:07:06.351868+00:00)

## What it is
Forge is an open-source, unofficial rules engine for Magic: The Gathering built in Java, letting players play against AI opponents across many formats. It includes single-player Adventure and Quest modes and runs on desktop platforms and Android.

## Use cases
- play magic the gathering against ai offline
- draft and sealed simulator for mtg
- play commander against computer opponents
- mtg adventure mode like shandalar
- open source magic the gathering rules engine
- play mtg on android without internet
- build custom cards for a mtg engine

## When to choose
- you want to play MTG solo against AI in formats like draft, sealed, or commander
- you want a free cross-platform MTG client on Windows, Mac, Linux, or Android
- you want to explore an overworld adventure mode with card collection
- you are a developer who wants to contribute cards or features to an MTG engine

## When to avoid
- you want official online play against humans via Wizards of the Coast services
- you need a lightweight mobile game on low-end Android devices (6GB RAM minimum)
- you want an officially licensed MTG product with support

## Facets
- artifact type: application
- maturity: active
- function: game-engine, simulation
- domain: gaming-tools, cross-platform
- platform: windows, jvm, cross-platform
- tags: magic-the-gathering, rules-engine, card-game, ai-opponents, quest-mode, adventure-mode, draft, commander, game-development, macos, linux, android, ios

## Member repositories
- Card-Forge/forge (main) score 94

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:06.351868+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 2026-08-30T02:19:10.279199+00:00, confidence not recorded.
  - readme: https://github.com/Card-Forge/forge (fetched 2026-08-28T04:07:06.351868+00:00, sha 372aa137893c)
  - homepage: https://card-forge.github.io/forge/ (fetched 2026-08-29T10:02:06.733662+00:00, sha f9b21da48992)
- Data as of 2026-08-30T08:39:29.467469+00:00.