OpenXRay is an 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.

This is a fan-made project not affiliated with GSC Game World in any way. However, they know about many community projects, including this, and support S.T.A.L.K.E.R. community efforts to make the game better.

Installation instructions are on the How to install and play page.

• Call of Chernobyl 1.4.22.
• Call of Pripyat 1.6.02.
• Clear Sky 1.5.10. (minor bugs are possible, but the game is stable finishable. See #382)

Shadow of Chernobyl is not supported yet. (see #392)
Legends of the Zone/Enhanced Edition is not supported and won't ever be likely. (see #1865)

• Support for 64-bit.
• Improved performance, better FPS.
• Original bugs fixes.
• New features for modmakers.
• Works on Linux, macOS, *BSDs and supports ARM, ARM64, E2K (Elbrus 2000), PPC64LE architectures.

You can see the detailed differences table here.

1. Clean up engine code, boost performance, and fix original X-Ray Engine bugs that were polluting S.T.A.L.K.E.R. series.
2. Make it a drop-in replacement for original engine.
   1. Aim at 99% compatibility and same behaviour, where possible.
3. Support all three games in the series: SOC/CS/COP.
4. Introduce a solid platform for modmakers:
   1. Add frame/render graph for those who want to add new graphics features.
   2. Add new scripting, development and debugging features.
   3. New game SDK with new features.
5. Enhance player's experience with new graphics, gameplay and other features that can be enabled optionally. (by default, we stay close to vanilla)

All contributions are more than welcomed. There are several ways how you can contribute:

Play and enjoy the game, file an Issue when you encounter any bugs, or you have an enhancement request.

Join us on our Discord, subscribe to our YouTube channel, join our VK group, leave a comment, put a like and communicate there!