Mazes and Monsters (1982)

Despite their personality differences, Kate, Jay Jay, Daniel and Robbie are close college friends, bound together by their pleasure in playing a game called "Mazes and Monsters." In order to keep it interesting, they decide to take the game from the board into a real-life setting. But soon the line between reality and fantasy becomes difficult to differentiate, and what started out as just a game soon becomes a nightmare.