The Lost World Part 8: Hell Unleashed is a mod for registered Wolfenstein, made by Richter Belmont in collaboration with Mac Mendoza. It was released on July 25, 2008.
It was released as a test version and featured two new levels, depicting a very extensive outside atmosphere. Some sprites, including the weapons, used high resolution.
It was also a quite early release in SDL, and exemplified the many advantages it brought.
A full version was never released.