Requirements
Windows, Steam game versions, and the runtimes needed by the loader.
Requirements
- A Windows installation of Left 4 Dead 1 or Left 4 Dead 2 on Steam, using the supported 32-bit game build.
- The current Scooby Loader, with a valid free-key session or paid sign-in.
- Microsoft Visual C++ runtimes: x64 for the loader and x86 for the game module/helper.
- A local offline map started with
-insecure.
Rendering
Direct3D 9 is the verified Windows path. Vulkan/DXVK depends on the game installation. The OpenGL UI preview is supported separately; stock Windows L4D does not provide a native OpenGL game renderer.
Adapters check the installed game binaries before enabling hooks. A game update may require a matching Scooby update.