E.V.O.: Search for Eden

The story of E.V.O.: Search for Eden is similar to modern evolutionary theories. First, you control a prehistoric sea creature and fight for evolution points, which you can use to improve your fish's body parts and boost its attack/defense abilities. The gameplay is not completely linear, meaning that certain decisions about paths and levels influence the player's success. The game consists of a series of levels in which the marine organism slowly evolves into an amphibian and later into a purely land-dwelling creature. The physical changes are fairly scientifically accurate, which also gives the game a semi-educational purpose.