Finally a game half open. You start with a small creature and when you make offspring you go to an editor to design them. At any time the game populates the system with creatures designed by other players. First 2d, then 3d water, then walk
P. Funes, E. Sklar, H. Juille, and J. Pollack. From Animals to Animats 5: Proceedings of the Fifth
International Conference on Simulation of Adaptive
Behavior, page 525--533. Zurich, Switzerland, MIT Press, (August 1998)
Z. Gábor, {. Kalmár, and {. Szepesvári. TR-98-115. ``Attila József'' University, Research Group on Artificial Intelligence, JATE-MTA, Szeged, HU-6700, (1998)
P. Funes, E. Sklar, H. Juille, and J. Pollack. Technical Report, CS-97-197. Computer Science, Brandeis University, 415 South St., Waltham MA 02254 USA, (1997)