Some repacks require you to copy the contents of a _Redist or _Crack folder into the root directory. Always run Crysis64.exe as Administrator for the first launch.
Navigate to %USERPROFILE%\Documents\My Games\Crysis_Warhead\ Open game.cfg with Notepad and add: Crysis Warhead v1.1.1.711-Repack
Using a repack version usually offers several advantages for the modern gamer: Some repacks require you to copy the contents
Additionally, if you have an NVIDIA card, open the NVIDIA Control Panel > Manage 3D Settings > Program Settings > Add Crysis64.exe > Set to Prefer Maximum Performance . if you have an NVIDIA card
Often includes fixes for modern 1080p and 4K resolutions that weren't standard at launch. Quick Hardware Check: To run this version smoothly, you'll need at least a 2.2 GHz dual-core processor 1.5 GB of RAM