Necros Cavern is a free open source puzzle / adventure game playable just about anywhere it will compile. 32-bit Windows and Linux binaries are provided, though it should also compile and run under DOS or BSD.

In each level you'll be presented with a number of treasures, monsters and even a few traps. Starting from the left hand side of the screen, you need to navigate around both the monsters and the traps in order to reach a Chalice found at the far right. Each type of monster behaves differently, making it harder or easier to avoid them.

You cannot kill any of the monsters: you find a way to outsmart them. Along the way you'll find treasures scattered about that increase your score.