This is based on the excellent fanfiction I read on DOOMWORLD. which you can read here: http://www.doomworld.com/vb/showthread.php?s=&threadid=13601
This map is not like regular maps in that you can't play it (unless you edit and recompile the scripts). It's sort of like an interactive fanfic, so just watch and enjoy. It only takes around 2:30 to run.
Taylor for his excellent fanfic.
A few hours
Wad Author, XWE, WARM
If the Scripted Marine falls into the Lava, you'll need to restart the level.