Crystal Caves 
Game genres tend to be hard to separate, with the blurry lines between categories often not worth arguing. Is Mass Effect an RPG or a shooter? Does it matter? Genre terms probably find the most use as ways to discuss structure since, generally, we recognize what we’re getting into when we’re told that we’re going to play an adventure game or a fighting game. Even then, the chances of taking elements from multiple columns are high enough to render the exercise pointless.
Case in point: Crystal Caves, one of Apogee Software’s last games before they found massive success with Duke Nukem. Crystal Caves is the sort of extra-difficult platformer that begs you to repeat stages dozens of times before you complete them, god forbid with the highest possible score. It has a unique pace that encourages forethought over action. It shares more DNA with Chip’s Challenge than Mario. » Read more about Crystal Caves
