Duke Screw'em was published in 1997, not 1998. You can see this copy of the publisher's web page stored in arhive.org, from 21th december 1997:
http://web.archive.org/web/19971221032524/http://missioncd.com/InteractiveGames/InteractiveGames.html
The game is awful, but... How they managed to not get sued by 3D Realms?