A text adventure game in which you're a Time Police agent armed with a musical computer. The back of the box says (translated from French):
"From the depths of the Middle Ages, the powerful and mysterious GORK threatens to destroy our civilization.
You have been chosen to travel back in time to find GORK and destroy him.
BUT BE CAREFUL: his creatures and his magic are powerful, and to vanquish them, you'll have to fight with unusual weapons !!!
If success will cover you in glory, don't forget you'll bring chaos to the world should you fail.
So have heart, the fate of the world is in your hands..."