The Great Giana Sisters - Rainbow Arts/Time Warp (1987)

Star platform game which, due to similiar gameplay to Super Mario,  was actually banned soon after its release. Giana and her sister Maria are fast asleep and trapped in a strange, mysterious place.  The only way to escape is to find the magic diamond.  Nasties, gaping holes and time limits stand in the way but luckily various power ups can be collected and bonus crystals collected for extra lives.  Great headbanging fun for 1 or 2 players!