The Dungeonmaster

Paul Bradford (Jeffrey Byron) is 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.

One night, 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. Most of the challenges involve Paul using his X-CaliBR8 wristband to shoot people, monsters, and objects with laser beams.

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.

Paul, a computer whiz who spends more time with his machine than with his girlfriend, finds that he has been chosen as a worthy opponent for Mestema, an evil wizard who has spent centuries searching for a challenging foe. After having his computer changed into a wristband weapon, Paul does battle with a variety of monsters before finally coming face to face with the ultimate adversary.