Creatures 3, released on November 4, 1999, took a detour from the first two games. It took place on the actual spaceship that the Shee had used to flee Albia. The ship was divided into many carefully controlled environments (Norn Terrarium, Jungle Terrarium, Desert Terrarium, Marine Terrarium). Creatures 3 was much more technologically focused. Still, the goal was to experiment with the three principal species and create a living world out of an empty ship.
Source: Wikipedia, Creatures %28artificial life program%29#Creatures 3 , available under the CC-BY-SA License.