Lack of Crystal Caves in this thread is ALSO A SHAME. KILL YOURSELVES NOW, HEATHENS.
Like many of the great shareware games of the Era of 2D Platformers, Crystal Caves came in a trilogy, with the first episode available for free as the "shareware" version, and the other two available only with a full purchase.
OH MY GOD IT'S A SPIDER. But look at all that sweet, sweet treasure. Mmmm!
GIANT HAMMERS OF DOOM.
Wow it's so green.
But wait, there's more! Crystal Caves taught the young and impressionable youth of its time right from wrong!
WINNERS DON'T USE DRUGS, OKAY.
EDIT:
Halloween Harry / Alien Carnage.
THIS MAN KNOWS HIS SHIT.