Duke Nukum Episode One - Shrapnel City © 1991 Apogee Soft.
Released on November 1, 1991.
Duke Nukum was the title of the 2.0 version of Duke Nukem. The E was changed to a U in order to avoid a lawsuit with the Captain Planet cartoon show. However, Apogee subsequently learned that the name was not copyrighted, so they registered it and used it for all future titles.