69%Strong matchCreatura
67%21167% positive reviews, Mixed across 211 reviews·Science · Sandbox
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They hunt, they grow, they change. Care for multiple aliens in a single terrarium, fill it with plants and gear, and keep light and environment in balance. Every reproduction yields Exobiotin, a valuable protein. Keep control, or they may break out.
ExoLife Terrarium Simulator
SteamWelcome to the Alien Terrarium: they hunt, they grow, they change. In this realistic simulation you care for multiple aliens, build up your terrarium with plants and gear, and keep the environment in balance. They are smart, they react to what you do, and they will exploit weaknesses.

Your aliens have needs like hunger and thirst, show distinct traits, and react to stimuli in their habitat. They can be timid, but they grow bolder. Observe their behavior, learn their patterns, and adjust their environment, or they will adapt to you.

Over time they develop through genetic adaptation, shift their behavior, and adjust to both their surroundings and your care. Every reproduction leaves behind Exobiotin, a valuable protein that makes the effort worthwhile.

If the terrarium falls out of balance or needs go unmet, things turn dangerous. The aliens will look for ways to escape, and a breakout is a catastrophe.
Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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