Frayed: SDL Fiend Edition is a mod for registered Wolfenstein, made by Joshua Waight under the alias Venom Inc. It was released on June 20, 2011.
It is an enhanced version of 2009's Frayed with 10 additional levels, many new graphics, all in high resolution and featuring a very atmospheric playback with numerous new weapons and a quite gory scenery.
Other source code changes include multiple textured floors and ceilings. New music is also featured.
All 40 levels are played in episodic flow.