To toggle the hud in Fear 3 on/off with a key press, download the Fear3-hudtoggle.zip file.
Download link: http://1drv.ms/1JXYP9i
1. Extract Fear3-hudtoggle.zip into Fear 3 installation directory.
2. Run Fear 3.
3. In game, press Q key to toggle hud (you may need to press it twice).