: This is a video codec file used for in-game cutscenes. If this is missing, try verifying your game files
Verify integrity of game files via Steam Properties > Installed Files. Missing DirectX 9 component. sleeping dogs dll files
Stuck on loading screen :: Sleeping Dogs™ General Discussions : This is a video codec file used for in-game cutscenes
: A file related to Xbox controller support and DirectX. How to Fix Missing DLL Files Safely sleeping dogs dll files
: This indicates a missing Visual C++ Redistributable (specifically the 2010 version).
For those comfortable going deeper, the Sleeping Dogs modding community has created DLL-based patches to fix engine-level issues and improve the game. These are not for fixing missing file errors but can vastly improve the experience.