In 1985 CRL Group PLC (whoever that is) released a game for the Commodore 64 system based on the classic midnight movie The Rocky Horror Picture Show.
 

Do you wish to be the “asshole” or the “slut”?
 
In the game, the player can play as Brad or Janet. It’s a bit difficult to follow, but the task seems to be to construct a machine that will counteract the effects of the Medusa Transducer, pieces of which (and keys to open various portals) are scattered all over the castle, in order to free your partner from stone and escape the castle before it blasts off for the planet Transsexual, in the galaxy of Transylvania. The castle’s freaky denizens attempt to block your progress by stealing your clothes and your inventory (but more interestingly, your clothes—your character spends big chunks of the game “starkers”). Riff-Raff has a deadly laser gun, and Eddie can run the player over with his motorcycle, and so on.
 

Janet in the Rocky Horror castle

Considering that six years had passed since the introduction of Adventure for the Atari 2600 system (in which the player runs around a series of rooms avoiding dragon and picking up keys etc.), the gameplay of The Rocky Horror Show Computer Game is disappointingly crude.

The presence of Richard O’Brien’s name in the title—the actual name of the game appears to be “Richard O’Brien’s Rocky Horror Show Computer Game”—certainly lends the proceedings a veneer of credibility, but the slight alteration in the title prompts the speculation that perhaps this game was not officially licensed? Or maybe they were playing with the fact that since this was not a movie version, it can’t be a “picture show”?

Here’s a brief video showing some of the dysfunctional gameplay, complete with Max Von Sydow soundalike commentary:

 
This video is longer and presents a more thorough exploration of successful gameplay—however, no amusing commentary:

 
via William Caxton Fan Club (a.k.a. John Darnielle’s Tumblr)

Previously on Dangerous Minds:
70s Michael Stipe in drag at ‘Rocky Horror’
On Location With ‘The Rocky Horror Picture Show’ from 1975