This is a player skin of Duke Nukem from the Duke Nukem 3D game, and it comes complete with various Duke taunts, sounds and even crouching & death animations. This is for the classic Doom games and it works on the Zandronum & Skulltag sourceports. To use it, simply put this into the skins folder of any of those ports mentioned and go to player setup and select the Duke Nukem skin to use instead of being the normal Doomguy