Those of you with an Oculus Quest 2 can play a version of the ZX81 game, 3D Monster Maze in VR.
You can see a video made by the author, Stephen Smith, below.
3D Monster Maze was originally launched for the ZX81 in 1982 and was programmed by Malcolm Evans. The game has retro-actively been dubbed a survival horror game. In the game you must avoid a T-rex which has been let loose in a maze. You must find the exit before the dinosaur finds you.