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You awaken without any knowledge of who you are, as a voice tells you that you are “The Aethernaut”, capable of exploring the Construct despite the deadly aether. Explore a series of rooms and solve the experiments as you discover who you are. Will you escape the Construct before it's too late?
Price history tracked since Jul 7, 2026 · vs all tracked offers.
Based solely on tracked price history — not purchase advice.
How it worksTracked since Jul 7, 2026.
Steam Train Fest starts Jul 20, 2026
Official stores with direct support.
Third-party resellers. Often cheaper, without official store support. Keyshop prices vs Steam →
Try this game before buying.
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Aethernaut is a first person puzzle game set in an open steampunk world. Guided by the voice of Cornell, a scientist who claims to want to help you, you are tasked with solving various puzzles to progress and reach the deeper areas of the Construct.
Choose how the story unfolds based on your answers to Cornell’s philosophical questions, as he seeks to better understand your nature and personality. Would you rather be remembered forever as an evil tyrant, or be completely forgotten? Is happiness or usefulness a more important purpose in life? When we fall in love, do we love the real person or just our idea of that person?
Through your answers, you will discover yourself and learn more about your past, and how you are able to survive the deadly aether.
But there is more to the story. As you delve deeper into the abandoned Construct, an unseen entity tries to make contact with you, and begs for your help. Who will you trust? Who are you, really?
Solve puzzle rooms using light, sensors, portals and time travel to gather the aether vials and access the core of the Construct.
Discover hidden secrets within the Construct. Jump, climb, and use the portals to reach new areas.
How will you answer Cornell’s questions? His increasingly personal queries will prompt you to reveal your personality, which will in turn shape the story around you. With 6 possible endings, depending on your answers and how you solve the puzzles (or if you do at all!) Aethernaut will unlock the depths of your soul.
Lowest tracked price: €2.96 (Jul 7, 2026) · current best: €2.96 across 4 stores.
60% positive reviews all-time.
Right now the cheapest offer for Aethernaut is €2.96 at Steam. KingsPrice compares 4 offers from 4 stores — official stores and keyshops — and refreshes prices throughout the day.
The lowest price KingsPrice has tracked for Aethernaut is €2.96 (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.
Keyshops are marketplaces that resell game keys, usually below official store prices. The keyshops listed on KingsPrice deliver genuine Steam keys, but buyer protection differs from official stores — check the shop's rating and refund policy before buying. You can hide keyshop offers at any time with the keyshops toggle. Keyshop prices vs Steam →
Create a free price alert on this page and KingsPrice will email you when Aethernaut 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.
