About This File
The aliens were created by revolving my roomates great model of an alien in front of a camera attached to a computer at the University of Central Florida.
Results: The best (realistic) alien patch I've ever seen (to be modest).
There are lots of sounds from the R-rated movie so if you offend easily be warned. (But if you like Doom, I doubt you are very sensative.) Anyway, you can just edit the aliens.bat file to remove the sound wad aliensnd.wad if it bugs you.