Spacestein is a mod for registered Wolfenstein, made by Maxim Zhukov. It was released on March 24, 2000.
A final version was released on April 1, 2000 containing three levels. As with most of Zhukov's sets, mapping was hired in. Brian Lowe contributed all three levels, which were all of good quality.
At one point, Thomas Hubert was also expected to contribute to the mapping, but this never came to be.
Graphics were taken from numerous sources, and features several bizarre ideas, making for a surreal gameplay.