Crystal Caves
geocities.com
Provides downloads, screenshots, cheats, and links.
Perilous Crystal Caves Website
spikenexus.toxicsheep.com
Features downloads, level maps, cheats, trivia, stories, and information.
3D Realms - Crystal Caves
3drealms.com
The official Crystal Caves page, from its creators. There is a link to purchasing the game.
GameFAQs: Crystal Caves
gamefaqs.com
Reviewed by KBroccoli, 6.5/10. "A more thorough gaming experience than the Commander Keen saga, it's a perfect little game for the fans of that kind of PC gaming or those after a touch of nostalgia."