# OpenXRay/xray-16

Improved version of the X-Ray Engine, the game engine used in the world-famous S.T.A.L.K.E.R. game series by GSC Game World. Join OpenXRay! ;)

Repository: https://github.com/OpenXRay/xray-16
Canonical: https://ross.abutalabs.com/products/xray-16
Homepage: https://discord.gg/sjRMQwv
Language: C++
License: NOASSERTION
License Family: other
Topics: directx11, opengl, cpp17, game-engine, stalker, xray-engine, x64, d3d11, directx, sdl, sdl2, opensource, engine, cplusplus, 3d-engine, cmake, arm64, mod, gamedev, game
Last push: 2026-07-30T00:54:11+00:00

## Health v2 (maintenance only)
Score: 66/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 95, release rhythm 8, longevity 100
- inputs: {"age_days": 4380, "days_push": 35, "days_rel": null, "gap_med": null, "n_releases_24m": 0}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 3547, forks 525 (observed 2026-08-28T04:08:09.419271+00:00)

## What it is
OpenXRay is an improved, community-maintained version of the X-Ray Engine that powers the S.T.A.L.K.E.R. game series. It adds 64-bit support, performance improvements, bug fixes, and modding features while remaining a drop-in replacement for the original engine.

## Use cases
- play s.t.a.l.k.e.r. games on linux or macos
- run stalker call of pripyat in 64-bit with better fps
- build mods for s.t.a.l.k.e.r. with new engine features
- fix bugs from the original x-ray engine
- port x-ray engine to arm64 or bsd

## When to choose
- you want to play supported S.T.A.L.K.E.R. titles (CoP, CS, Call of Chernobyl) with improved performance and cross-platform support
- you are a modmaker who wants new scripting, rendering, and SDK features
- you want to contribute to or study an open-source C++ game engine

## When to avoid
- you want to play S.T.A.L.K.E.R. Shadow of Chernobyl, which is not yet supported
- you need a general-purpose engine for building new games from scratch
- you want to run the Legends of the Zone / Enhanced Edition

## Facets
- artifact type: application
- maturity: active
- function: game-engine, graphics, simulation
- domain: gaming-tools, cross-platform
- platform: windows, cpp
- tags: xray-engine, stalker, sdl2, directx11, opengl, modding, 64-bit, open-source-engine, game-development, linux, macos, cmake

## Member repositories
- OpenXRay/xray-16 (main) score 66

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:08:09.419271+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 2026-08-29T18:34:23.328784+00:00, confidence not recorded.
  - readme: https://github.com/OpenXRay/xray-16 (fetched 2026-08-28T04:08:09.419271+00:00, sha e966bebc2704)
  - homepage: https://discord.gg/sjRMQwv (fetched 2026-08-29T09:28:21.448420+00:00, sha ae3a4c73bce8)
- Data as of 2026-08-30T08:39:29.467469+00:00.