# xoreos/xoreos

A reimplementation of BioWare's Aurora engine (and derivatives). Pre-pre-alpha :P

Repository: https://github.com/xoreos/xoreos
Canonical: https://ross.abutalabs.com/products/xoreos
Homepage: https://xoreos.org/
Language: C++
License: GPL-3.0
License Family: copyleft
Topics: bioware, aurora, game, c-plus-plus, neverwinter-nights, dragon-age, knights-of-the-old-republic, kotor, nwn, nwn2, jade-empire, reverse-engineering, reimplementation, rpg, roleplaying-game, the-witcher, kotor2
Last push: 2026-08-31T21:43:29+00:00

## Health v2 (maintenance only)
Score: 68/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 100, release rhythm 8, longevity 100
- inputs: {"age_days": 5868, "days_push": 2, "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 1168, forks 132 (observed 2026-09-01T02:14:08.513677+00:00)

## What it is
xoreos is an open-source (GPLv3+) reimplementation of BioWare's Aurora engine and its derivatives, targeting games from Neverwinter Nights through Dragon Age II. It aims to let users play these games portably on platforms like GNU/Linux and macOS using their original game media, though full gameplay is not yet implemented.

## Use cases
- play neverwinter nights on linux without the original engine
- run kotor on macos with an open-source engine
- reimplement bioware aurora engine games
- reverse engineer bioware game file formats
- explore aurora engine game areas in spectator mode
- contribute to an open-source game engine reimplementation

## When to choose
- you own original BioWare games and want a portable, open-source way to run them on unsupported platforms
- you want to study or contribute to reverse-engineering of the Aurora engine and its file formats
- you need tools to inspect Aurora engine resources, models, and areas

## When to avoid
- you want to fully play these games today - normal gameplay is not yet implemented
- you need a drop-in replacement for the original game executables with complete feature parity
- you do not own the original game media, since xoreos requires it and does not endorse piracy

## Facets
- artifact type: application
- maturity: experimental
- function: game-engine, graphics, audio-processing, parser, reverse-engineering
- domain: gaming-tools, cross-platform, reverse-engineering
- platform: windows, cpp, cross-platform
- tags: bioware, aurora-engine, rpg, neverwinter-nights, kotor, dragon-age, the-witcher, jade-empire, engine-reimplementation, game-portability, game-development, linux, macos

## Member repositories
- xoreos/xoreos (main) score 68

## Provenance
- Observed fields: from GitHub, fetched 2026-09-01T02:14:08.513677+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 2026-08-30T06:29:28.850016+00:00, confidence not recorded.
  - readme: https://github.com/xoreos/xoreos (fetched 2026-09-01T02:14:08.513677+00:00, sha 11b72abbe5e5)
  - homepage: https://xoreos.org/ (fetched 2026-08-29T12:35:31.540788+00:00, sha 9784a5b9299c)
  - site_page: https://xoreos.org/about/index.html (fetched 2026-08-29T12:35:31.551516+00:00, sha 7473383ccd6d)
  - site_page: https://xoreos.org/doxygen (fetched 2026-08-29T12:35:31.553787+00:00, sha 20dcab8c3d7c)
  - site_page: https://xoreos.org/blog/categories/releases (fetched 2026-08-29T12:35:31.556717+00:00, sha f935e14ea28e)
  - site_page: https://xoreos.org/blog/2015/04/12/the-witcher-models-and-areas (fetched 2026-08-29T12:35:31.558710+00:00, sha 09d698a0fe1b)
- Data as of 2026-08-30T08:39:29.467469+00:00.