69,105 Keys

69,105 Keys is a short interactive fiction game, in which the protagonist has found himself at the door of The Count's treasure vault, inside of which immense riches await. The only remaining task is to find the right key — out of the tens of thousands of keys strewn upon the floor.

A series of close examinations reveals that the keys differ in a myriad of characteristics, such as color, material, brand, and size, and the trick (and the sole goal of the game) is to find the one and only key which is unlike all the others. In this endeavour, the COUNT command will be indispensable; the game understands complex commands such as "count orange oval huge scratched Acme keys".