Biosphere Simulator is a planetary god game sandbox where you guide a dead volcanic world through billions of years of evolution. Seed life, shape ecosystems, unleash cataclysms, and watch civilizations rise from primordial microbes to spacefaring societies.

<p class="bb_paragraph" ><span class="bb_img_ctn"><img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/c8b0c9240ba10102fb9cdd9bc6bc9409.avif?t=1782923080" width=780 height=80 /></span></p><h2 class="bb_tag" ><strong>Breathe Life Into a Dead World</strong></h2><p class="bb_paragraph" >Biosphere Simulator is a planetary god game sandbox where you guide an entire world from barren volcanic rock to thriving spacefaring civilization.</p><p class="bb_paragraph" >Shape the atmosphere. Carve oceans. Seed the first microbes. Then sit back and watch evolution unfold across billions of years as ecosystems grow, species adapt, and civilizations rise… or collapse into extinction.</p><p class="bb_paragraph" >Every world evolves differently. Every playthrough creates a new planetary history.</p><p class="bb_paragraph" ><span class="bb_img_ctn"><video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/93a74b7ff33984d98a5c8d42dd317043.poster.avif?t=1782923080" width=780 height=250 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/93a74b7ff33984d98a5c8d42dd317043.webm?t=1782923080" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/93a74b7ff33984d98a5c8d42dd317043.mp4?t=1782923080" type="video/mp4"></video></span></p><h2 class="bb_tag" ><strong>Three Epochs. One Living World.</strong></h2><h2 class="bb_tag" ><strong>Geological Era</strong></h2><p class="bb_paragraph" >Your planet begins as a hostile world of erupting volcanoes, shifting tectonic plates, and toxic atmosphere.Cool the planet. Stabilize the oceans. Shape the conditions for life to emerge from primordial chaos.</p><h2 class="bb_tag" ><strong>Biological Era</strong></h2><p class="bb_paragraph" >Seed your world with microbes and guide the great chain of evolution. From single-celled organisms to complex insects, armored fish, towering reptiles, and resourceful mammals.</p><p class="bb_paragraph" >Predators and prey evolve together as life adapts across oceans, forests, deserts, and frozen tundras.</p><p class="bb_paragraph" >Watch ecosystems grow, collapse, and transform through mutation, extinction events, and natural selection.</p><p class="bb_paragraph" ><span class="bb_img_ctn"><video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/cdf3aa40997d187db8f8180303e664e5.poster.avif?t=1782923080" width=780 height=250 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/cdf3aa40997d187db8f8180303e664e5.webm?t=1782923080" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/cdf3aa40997d187db8f8180303e664e5.mp4?t=1782923080" type="video/mp4"></video></span></p><h2 class="bb_tag" ><strong>Technological Era</strong></h2><p class="bb_paragraph" >Civilizations emerge. Tribes form, cities grow, and empires expand.</p><p class="bb_paragraph" >Watch your species develop agriculture, industry, and eventually reach for the stars. But beware — technological progress brings new threats. Nuclear war, climate collapse, and resource depletion can end it all.</p><p class="bb_paragraph" >Will your world thrive… or collapse beneath the weight of civilization?</p><p class="bb_paragraph" ><span class="bb_img_ctn"><video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/72961715eae88e8f3bd547217ab0441a.poster.avif?t=1782923080" width=780 height=250 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/72961715eae88e8f3bd547217ab0441a.webm?t=1782923080" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/72961715eae88e8f3bd547217ab0441a.mp4?t=1782923080" type="video/mp4"></video></span></p><h2 class="bb_tag" ><strong>God Powers</strong></h2><p class="bb_paragraph" >Guide evolution or destroy it. The choice is yours.</p><p class="bb_paragraph" >Intervene directly with powerful god abilities. Hurl asteroids to trigger mass extinctions and clear the way for new life. Supercharge evolution to accelerate speciation. Trigger volcanic eruptions to reshape continents. Spawn rain to terraform deserts. Ignite wildfires to reset overgrown ecosystems.</p><p class="bb_paragraph" >Every action has cascading consequences across your living world.</p><p class="bb_paragraph" ><span class="bb_img_ctn"><video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/bca1ac40df0e34aed2216496e0bd50c2.poster.avif?t=1782923080" width=780 height=250 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/bca1ac40df0e34aed2216496e0bd50c2.webm?t=1782923080" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/bca1ac40df0e34aed2216496e0bd50c2.mp4?t=1782923080" type="video/mp4"></video></span></p><h2 class="bb_tag" ><strong>A World Shaped by Evolution</strong></h2><p class="bb_paragraph" >Watch your world evolve across billions of years as ecosystems adapt, civilizations emerge, and planetary forces reshape the future of life itself.</p><p class="bb_paragraph" ><span class="bb_img_ctn"><video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/df6d6215fb1a500fef2bb320d7885d24.poster.avif?t=1782923080" width=780 height=250 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/df6d6215fb1a500fef2bb320d7885d24.webm?t=1782923080" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/df6d6215fb1a500fef2bb320d7885d24.mp4?t=1782923080" type="video/mp4"></video></span></p><h2 class="bb_tag" ><strong>DNA &amp; Mutation Engine</strong></h2><p class="bb_paragraph" >48+ unique species evolve across three evolutionary epochs. Every creature carries a simulated genome, with mutations accumulating over generations to drive speciation and adaptation in response to environmental pressures.</p><p class="bb_paragraph" ><span class="bb_img_ctn"><video class="bb_img" autoplay muted loop playsinline poster="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/9f33cf5d41ff97f588dd43b3f07e545d.poster.avif?t=1782923080" width=780 height=250 ><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/9f33cf5d41ff97f588dd43b3f07e545d.webm?t=1782923080" type="video/webm; codecs=vp9"><source src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/9f33cf5d41ff97f588dd43b3f07e545d.mp4?t=1782923080" type="video/mp4"></video></span></p><h2 class="bb_tag" ><strong>Ecosystem Dynamics</strong></h2><p class="bb_paragraph" >Predator-prey relationships, food webs, and carrying capacities create emergent population cycles across 13 distinct biomes — from deep ocean vents to frozen tundras. No two ecosystems develop the same way.</p><h2 class="bb_tag" ><strong>Atmospheric Modeling</strong></h2><p class="bb_paragraph" >Greenhouse gases, oxygen levels, temperature, and weather interact in a dynamic climate system. Volcanic eruptions, asteroid impacts, and biological activity all reshape the atmosphere.</p><h2 class="bb_tag" ><strong>Emergent Civilizations</strong></h2><p class="bb_paragraph" >Intelligent species develop culture, technology, and politics through emergent AI systems. Their choices affect the planet — for better or worse.</p><h2 class="bb_tag" ><strong>Catastrophic Events</strong></h2><p class="bb_paragraph" >Asteroid impacts, supervolcano eruptions, ice ages, pandemics, and powerful god abilities can reshape your world in an instant. Adapt or go extinct.</p><h2 class="bb_tag" ><strong>Biodiversity Engine</strong></h2><p class="bb_paragraph" >Track species diversity, monitor extinction rates, and watch evolutionary arms races unfold across deep time.</p><h2 class="bb_tag" ><span class="bb_img_ctn"><img class="bb_img" src="https://shared.akamai.steamstatic.com/store_item_assets/steam/apps/4606790/extras/b060ed88c1afbc4283c0633c71e1154a.avif?t=1782923080" width=780 height=80 /></span></h2><ul class="bb_ul"><li><p class="bb_paragraph" >Guide life across 3 interconnected epochs spanning billions of years of planetary history</p></li><li><p class="bb_paragraph" >Unleash 10 god powers, including asteroids, volcanoes, wildfires, rainstorms, and evolution boosts</p></li><li><p class="bb_paragraph" >Generate infinite unique planets through procedural world generation</p></li><li><p class="bb_paragraph" >Fast-forward through deep time or pause to intervene and reshape history</p></li><li><p class="bb_paragraph" >Watch civilizations rise, expand, collapse, and reach for the stars</p></li><li><p class="bb_paragraph" >Every action creates cascading consequences across your evolving world</p></li></ul>

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Biosphere Simulator Achievements