Since this game is not hosted on the Google Play Store, the installation process is manual. Here is the standard procedure for installing games that require OBB files.
The "Reprisal" version refers to an unofficial port that allows the classic PC game to run on Android devices using touch controls and optimized graphics. It is not available on the Google Play Store, meaning users must download the APK (Android Package Kit) and the OBB (Opaque Binary Blob) data files manually. Hitman Blood Money Reprisal Apk Obb Download For Android