Cow V: The Great Egg Quest

Distribution

Some games are released as freeware; some as shareware. Once in a while, one is released as something esoteric like postcardware. According to its documentation, this game was released as "Hippo-ware": under its conditions, "if you use this program you must send $10 to a local zoo, specifying that the money should go towards the purchase of a new hippopotamus."