Fraggerstein 3D is a mod for registered Wolfenstein, made by Topfragger. It was released on April 7, 2003.
The mod features 6 levels spread across three episodes (four on Episode 1, and one each for Episodes 2 & 3). Some graphics have been changed, mainly in a crude, cartoon-like fashion, featuring snowmen, Homer Simpson and a penguin.
The mod is playable in SDL as no source code changes were featured.