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You explore an alien machine, learn to operate it, create virtual organisms, and grow an artificial ecosystem inside it. You design species down to individual atoms and watch them fight for survival. You then send successful species to other players to leech energy from them and power your machine.
Price history tracked since Jul 7, 2026 · vs all tracked offers.
Based solely on tracked price history — not purchase advice.
Tracked since Jul 7, 2026.
Steam Train Fest ends
Try this game before buying.
soul Interface is an evolution simulator / sandbox with functioning natural selection and space multiplayer. It provides multiple playstyles depending on which you prefer:
Involved - You get to design organisms with soft bodies made of individual atoms and brains made up of neurons and neural networks. You program or train their behaviors to outeat, outgrow or hunt into extinction competing lifeforms. Eventually, you get to send out your most invasive organsims and duel with other players, trying to overtake their ecosystems with your species…
Chill - You are tasked with growing and maintaining a virtual aquarium.
You will create safe, warm currents to grow digital jellyfish; architect growbeds for virtual seaweed; or safe hunting grounds for baby sharks. Select species of plants and predators that coexist well together… and watch your digital ecosystem flourish!
All this wrapped in hand-programmed vector graphics, from an alternate reality 2000s. The game features full voiceacting and an atmospheric music score by our amazing composer, Geoffrey Guyer.
| Join our Discord to participate in development and ex[erimentation;
| Check our YouTube for instructional videos if you want to try AI-training.
| We recommend "Morse Expert" or similar for transcribing encrypted transmissions.
Lowest tracked price: €12.79 (Jul 7, 2026) · current best: €12.79.
76% positive reviews all-time.
Right now the cheapest offer for soul Interface is €12.79 at Steam. KingsPrice compares 1 offers from 1 stores — official stores and keyshops — and refreshes prices throughout the day.
The lowest price KingsPrice has tracked for soul Interface is €12.79 (recorded on Jul 7, 2026). This covers the stores and period we monitor — set a price alert to catch the next drop to that level.
Create a free price alert on this page and KingsPrice will email you when soul Interface drops below your chosen price. The biggest discounts usually appear during seasonal Steam sales and publisher promotions — the sale calendar on this page shows the next confirmed event.
