OpenXRay is a game engine that is an improved, community-maintained version of the X-Ray Engine originally used in the S.T.A.L.K.E.R. series.
The project addresses the technical limitations and bugs of the original X-Ray Engine by modernizing its codebase and expanding platform support. It adds 64-bit support, improves performance and frame rates, fixes original engine bugs, and extends compatibility to Linux, macOS, BSD systems, and multiple CPU architectures including ARM, ARM64, and others. The engine functions as a drop-in replacement for the original, maintaining high compatibility while introducing new capabilities for modmakers through a frame and render graph system, enhanced scripting features, and an expanded game SDK.
The tool suits developers and modders working with S.T.A.L.K.E.R. games who want improved stability, better performance, or cross-platform support. It currently supports Call of Chernobyl, Call of Pripyat, and Clear Sky, though Shadow of Chernobyl support remains incomplete. The project prioritizes staying close to vanilla behavior by default while offering optional enhancements for graphics, gameplay, and other features. Those choosing this engine should be aware it is a fan-made project not affiliated with GSC Game World, though the original developers acknowledge and support community efforts.
The project maintains active continuous integration with automated builds. Development activity shows ongoing engagement with bug fixes, feature additions for modmakers, and cross-platform improvements. The team actively manages issues and accepts community contributions across multiple areas including gameplay, graphics, and core engine work.
