Far Cry Classic mod by Mixer. Extract to your root Far Cry folder & start the mod by running the Fcclassic exe
Far Cry Classic for PC mod doesn't copy native PS2/XBOX version features because of ability to use mouse and keyboard controls on PC instead of joystick usage on consoles.
Far Cry Classic mod for PC allows to choose between 2004 campaign levels and console version 2014 campaign levels to play through. Also it has unfinished COOP mode as well as other derivative stuff based on former Contest Island: Invasion mod, which has been build into Far Cry Classic mod due to standalone-mod-crash reason.
Here is some video showing some differences between original as well as some features of Far Cry Classic mod for PC