Vrack is a single level PWAD for Doom II released on November 12, 2000 by Fredrik Johansson. It requires a Boom compatible source port.
Vrack is set in a tech base floating somewhere in outer space, inspired to some degree by Dark Forces and also MAP04 of Dystopia 3 (which uses the same music, borrowed from Descent).
Vrack was followed by the similarly-styled Vrack 2 and Vrack 3.
The level contains a reference to Hissy in one of its secret rooms.
Vrack was the featured map at Opulent's Doomed Speed Demos Archive in December, 2000.
I'm Too Young To Die speedrun