Always back up your save files located in %Documents%\My Games\NieR Replicant\steam\ .
Ensure you have the latest Visual C++ Redistributables and DirectX installed.
Run NieR Replicant ver.1.22474487139.exe as Administrator. Recommended Fixes (Optional)
Ensure all .dat and .exe files have extracted correctly (check the data folder).
NieR.Replicant.v1.22474487139.zip Size: ~25 - 30 GB (Compressed) Format: .ZIP Archive Description
Highly recommended to fix frame rate stutters and high-refresh rate monitor issues.
This is a "Clean Steam Files" rip intended for archival purposes.