Crypt Killer is a horror-themed lightgun shooter where you play as a tireless adventurer searching for the "Eyes of Guidance", ancient crystals of mysterious power. To find them, you must shoot your way through hordes of monsters.
The game features six stages that can be taken on in any order, with each stage consisting of four acts. The levels range from dark forests to deep caves, ancient crypts, and underwater labyrinths. You move through 3D levels on a predetermined path, shooting at skeletons, zombies, spiders, demons, and other foul beasts. Your standard weapon is a shotgun, but you can gain additional weapons like gatling guns and grenade throwers. Some enemies throw projectiles like knives or bones at you, so be sure to aim at those as well. If the screen becomes too crowded, use a smartbomb to clear it. You also have the option to choose from two paths through the next act in some stages, giving you different ways of completing them.
The game culminates with a boss enemy at the end of each stage. With its mix of action and adventure elements, Crypt Killer is a thrilling experience that will keep you on the edge of your seat as you navigate through hordes of monsters to find the "Eyes of Guidance".