Creatures has three worlds, each one different and running seperately. They are connected by portals that only open after a certain number of norns are living in the current world. There are no ettins in this game, and grendels only appear in the island and jungle worlds. The jungle world contains a 'game-within-a-game', a simple, almost pac-man style video game. Creatures PS1 is more of a game than a simulation, but, while you have goals, you do not have to achieve them. This game has a unique combination of graphics from Creatures 1, 2 and 3.