The Witchaven PREF.DAT contains settings that can be changed within the game (as opposed to in the configuration utility), and is written to as well as read from in the main game EXE.
|0||INT16||Extra gore on (1) / off (0)|
|2||INT16||brightness Explain, valid range?|
|4||INT16||gbrightness Explain, valid range?|
|6||INT16||Sound effects volume Valid range?|
|8||INT16||Music volume Valid range?|
|10||INT16||Difficulty setting (1-4)|
The Witchaven source code was consulted.