If you are attempting to use a "repack" or pirated version:
Corrupted installation files or a partial download can result in the file not being placed in the game directory. How to Fix the steam_api.dll 1. Check Antivirus Quarantine If you are attempting to use a "repack"
If you are seeing an error message regarding steam_api.dll (such as "steam_api.dll is missing" or "failed to initialize") while trying to run Hitman: Absolution Professional Edition , it typically indicates a conflict between the game's execution and the Steam client. If you are attempting to use a "repack"
Steam will detect the missing steam_api.dll and download a fresh, official copy automatically. 2. Check Your Antivirus Quarantine If you are attempting to use a "repack"