The Dungeonmaster (aka Ragewar: The Challenges of Excalibrate aka Digital Knights), was produced by Charles Band, and consists of seven distinct story segments, each written and directed by a different person: Dave Allen, Charles Band, John Carl Buechler, Steven Ford, Peter Manoogian, Ted Nicolaou, and Rosemarie Turko.
In the film we meet Paul Bradford (Jeffrey Byron), a skilled computer programmer who lives with his girlfriend, Gwen (Leslie Wing), and “X-CaliBR8,” a quasi-sentient personal computer that Paul programmed and which he interacts with via a neural interface. Gwen is jealous of Paul’s unusually close relationship with X-CaliBR8, to whom Paul has given a female voice, and fears that their relationship will be destroyed by Paul’s reliance on X-CaliBR8 for his various day-to-day activities.
As often happens in movies such as this, Paul and Gwen are both transported to a Hellish realm presided over by Mestema (Richard Moll), an ancient, demonic sorcerer who has spent millennia seeking a worthy opponent with whom to do battle. Having long defeated his enemies with magic, Mestema has become intrigued with technology, and wishes to pit his skills against Paul’s, with the winner claiming Gwen. Arming Paul with a portable version of X-CaliBR8 (which takes the form of a computerized wrist band), Mestema begins transporting Paul into a variety of scenarios in which he must defeat various opponents by usually shooting them with a lazer from his wrist band.
After Paul completes Mestema’s various challenges, the two engage in a final battle, which takes the form of a fist fight in which Paul kills Mestema by throwing him into a pit of lava. After Mestema dies, Paul and Gwen are transported back to their house, where Gwen expresses her acceptance of X-CaliBR8 and suggests that she and Paul get married.
You can buy the movie here.