Spelunker, originally released in Japan for the NES, is an action-platformer known for its unforgiving difficulty. The game puts players in control of a spelunker exploring dangerous caves.  Gameplay involves navigating treacherous terrain, avoiding hazards such as bats and falling rocks, and collecting treasures.  Death is frequent due to the game's high difficulty.  The challenge comes not only from precise movement but also from the inherent dangers of cave exploration.   The American release likely features similar gameplay but may have variations in graphical elements or language. 

Spelunker (Japan)

Spartan X 2 (Japan)