Life simulation games (or artificial life games) is a sub-genre of simulation video games in which the player lives or controls one or more virtual lifeforms. A life simulation game can revolve around "individuals and relationships, or it could be a simulation of an ecosystem".
Life simulation games are about "maintaining and growing a manageable population of organisms", where players are given the power to control the lives of autonomous creatures or people. Artificial life games are related to computer science research in artificial life. But "because they're intended for entertainment rather than research, commercial A-life games implement only a subset of what A-life research investigates." This broad genre includes god games which focus on managing tribal worshipers, as well as artificial pets that focus on one or several animals. It also includes genetic artificial life games, where players manages populations of creatures over several generations.