Focuses on breeding and evolving your own animal tribe to survive in different biomes. 2. You're looking for a Research Paper or Article
Look under the "Simulation" tag for no-cost options. alien-life-simulator-pc-game-free-download
A relaxing ecosystem simulator where you can breed and evolve various life forms. Focuses on breeding and evolving your own animal
If you are looking for a game where you simulate or interact with alien life, there are several popular and highly-rated titles (though most are paid, not "free download" in a legal sense): alien-life-simulator-pc-game-free-download
A great place for free, experimental indie simulation games.
The classic "life simulator" where you evolve a species from a single cell to a space-faring empire.