robotfindskitten is a "Zen simulation", originally written by Leonard Richardson for MS-DOS. It is a free video game with an ASCII interface in which the user (playing the eponymous robot and represented by a number sign "#") must find kitten (represented by a random character) on a field of other random characters. Walking up to items allows robot to identify them as either kitten, or any of a variety of "Non-kitten Items" (NKIs) with whimsical, strange or simply random text descriptions. It is not possible to lose (though there is a patch that adds a 1 in 10 probability of the NKI killing robot). Simon Carless has characterized robotfindskitten as "less a game and more a way of life ... It's fun to wander around until you find a kitten, at which point you feel happy and can start again".