# open-goal/jak-project

Reviving the language that brought us the Jak & Daxter Series

Repository: https://github.com/open-goal/jak-project
Canonical: https://ross.abutalabs.com/products/jak-project
Homepage: https://opengoal.dev
Language: Common Lisp
License: ISC
License Family: permissive
Topics: lisp, scheme, jak, jak-and-daxter, ps2, reverse-engineering
Last push: 2026-08-25T03:53:32+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 99, longevity 100
- inputs: {"age_days": 2202, "days_push": 8, "days_rel": 8, "gap_med": 29, "n_releases_24m": 22}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3489, forks 230 (observed 2026-08-28T04:08:07.135225+00:00)

## What it is
OpenGOAL is a project that decompiles the Jak & Daxter PS2 games and recompiles them into native x86-64 ports, including a from-scratch implementation of the original GOAL Lisp-like language. It provides a compiler, runtime, and tooling that lets users play the games natively and create mods.

## Use cases
- play Jak and Daxter natively on PC without an emulator
- decompile PS2 game binaries to study how the original games worked
- make mods for the Jak and Daxter games
- study or contribute to a Lisp-like game language compiler
- port a PS2 game to modern platforms

## When to choose
- you own a legitimate PS2 copy of Jak & Daxter and want a native, high-performance port
- you want to mod the Jak games or create new content
- you are interested in compiler development, decompilation, or reverse engineering of PS2 games

## When to avoid
- you want to emulate other PS2 games - this only covers the Jak & Daxter trilogy
- you only have PS3/PS4/PS5 versions of the games - those are not supported
- you want a plug-and-play experience without providing your own game ISO

## Facets
- artifact type: application
- maturity: active
- function: compiler, interpreter, reverse-engineering, game-engine, programming-language
- domain: reverse-engineering, compilers, programming-languages, gaming-tools
- platform: windows, cpp, cross-platform
- tags: opengoal, goal-language, lisp, jak-and-daxter, ps2, decompilation, native-port, game-modding, x86-64-port, game-development, linux, macos, desktop

## Member repositories
- open-goal/jak-project (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:07.135225+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 2026-08-29T18:36:05.608386+00:00, confidence not recorded.
  - readme: https://github.com/open-goal/jak-project (fetched 2026-08-28T04:08:07.135225+00:00, sha dd21ac28762c)
  - homepage: https://opengoal.dev (fetched 2026-08-29T09:30:10.014601+00:00, sha 0766829ae9ac)
  - site_page: https://opengoal.dev/docs/category/jak-3-galleries (fetched 2026-08-29T09:30:10.031954+00:00, sha d3b805136ae9)
  - site_page: https://opengoal.dev/docs/intro (fetched 2026-08-29T09:30:10.023583+00:00, sha a50c20615fd4)
  - site_page: https://opengoal.dev/docs/faq (fetched 2026-08-29T09:30:10.025312+00:00, sha d369c40345d8)
  - site_page: https://opengoal.dev/docs/category/galleries (fetched 2026-08-29T09:30:10.027260+00:00, sha e33adf6a7576)
  - site_page: https://opengoal.dev/docs/category/jak-and-daxter-galleries (fetched 2026-08-29T09:30:10.028736+00:00, sha 5606977dab2b)
  - site_page: https://opengoal.dev/docs/category/jak-ii-galleries (fetched 2026-08-29T09:30:10.030270+00:00, sha 9766d46bf3a4)
  - site_page: https://opengoal.dev/blog/progress-report-q2-2026 (fetched 2026-08-29T09:30:10.033529+00:00, sha bbabe7c84a7c)
- Data as of 2026-08-30T08:39:29.467469+00:00.