danielkrupinski/osiris

Osiris is a game modification for Counter-Strike 2 that runs on both Windows and Linux. It injects itself into the running game process as a library file and adds extra visual information and features on top of the game's existing interface. The project uses the game's own built-in UI system (called Panorama) to render its overlay, which means the added elements look consistent with the game's native appearance. The features described in recent changelog entries include player information displayed in the game world, a bomb plant timer that shows whether a bomb can be planted before the round ends, hostage outline highlighting with customizable colors, a visualization for weapon inaccuracy when not scoping, and viewmodel field-of-view adjustment. Building the project requires a C++ compiler. On Windows that means Visual Studio 2022, and on Linux it works with recent versions of g++ or clang++. The build produces a DLL file on Windows or a shared library file on Linux. Getting it into the game requires a DLL injector on Windows, though the README notes that some popular injectors are detected by Valve's anti-cheat system. On Linux, injection is done with a debugger command, which also carries a detection risk. The technical notes section of the README describes deliberate low-level design choices: no standard C++ runtime library in release builds, no heap memory allocation, no external dependencies, and no background threads. These are common optimizations in this type of software to minimize the tool's footprint inside the game process. The project is open-source under the MIT license.