Perdition's Gate

32 NEW LEVELS FOR DOOM][

You thought the Doom ][ challenge was over... Get ready, You've come to Perdition's Gate. An experiment gone wrong, very wrong... a scientfic genetics engineering plant has been taken over by those very mutants it created. You must find out what happened... and the only way to do that is to fight the monsters to the death. The ultimate test of your skill, wit and personal character.

Source:

wizworks.com