Dungeon Keeper was originally missing a lot of sounds, but KeeperFX has been gradually adding them over time. Recently, even more sounds have been restored.
To enjoy these additional sounds, you'll need a new sound.dat file. This file was bundled with KeeperFX versions 1.2.0.4206 through 1.2.0.4220, but due to its large size and the cost of hosting, it’s no longer included with newer alphas.
If you missed those specific versions but still want to hear the ghosts make noise before the 1.3 release, simply download the sound.dat file and extract it into your game directory. Only for use on the Alpha patches.
Enjoy the enhanced audio experience!
- KeeperFX Team