the game follows an oversized, anthropomorphic snail named Mortimer, who seeks to save a fantasy world's animal population. Players pilot Mortimer—whose shell can transform into an aircraft or submarine— through a 3D world, while solving riddles and learning simple biology. Source: Wikipedia, "[en.wikipedia.org/wiki/Mortimer_and_the_Riddles_of_the_Medallion Mortimer and the Riddles of the Medallion]", available under the CC-BY-SA License.