CryGame - The stock GameDLL for the CryENGINE3 Free SDK.
Get the release that corresponds to your engine version from the Downloads page, and extract it into the engine root folder (e.g., C:\Dev\FreeSDK).
Whilst working with the CryENGINE3 SDK, you might implement a cool new feature that could benefit the community at large. After forking this repository and making your changes, you can submit a pull request and then, pending approval of the code, the entire community can use your feature!