Buy ONTOS Steam Key
ONTOS Steam Key: compare prices from 2 offers (November 2026)
An ONTOS Steam Key — also known as a CD Key or digital code — is the official activation code you redeem on Steam and keep in your library permanently. From €50.37 (€52.56 with fees) at Key4Games, Steam Account format · 2 verified stores, 2 offers in stock · Updated 01h 56min ago.
Official stores are authorized distributors, and while their prices may be higher than Key stores, their reliability is 100%.
“Choose it if you don’t mind the price difference”Key stores are resellers and marketplaces, which is why they are usually cheaper than official stores. We only show the best ones, so you can rest assured. Plus, we offer our guarantee against any issues.
“Choose it if you’re looking for a great discount”Prices change depending on the selected payment method.
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Final prices with fees
About ONTOS

From the creators of SOMA comes ONTOS, a sci-fi adventure that takes you to the edge of reality. You are Aditi Amani, invited to the repurposed moon hotel Samsara by the cryptic legacy of your estranged father, a brilliant mind-turned-prophet. What begins as a search for answers quickly spirals into something far stranger. Samsara is no ordinary outpost, but a place where reality fractures, where truths are buried beneath layers of deception and obscurity. As you delve deeper, guided by fragments of your father’s past, you must confront disturbing revelations about the nature of existence - and your place in it.

ONTOS presents a gauntlet of chilling experiments and disturbing encounters that push the boundaries of both science and morality. Each test invites you to peel back another layer of a world that takes you one step closer to the ultimate truth. Confront existential questions that will make you question the nature of the soul, suffering, and the very fabric of reality itself. These trials are not just puzzles—they are provocations. Your choices echo forward, and you must be prepared to face the consequences. Foresight is paramount, but even what you judge to be the best moral actions can lead to devastating outcomes.

At its core, ONTOS is an immersive narrative with a tactile, systems-driven gameplay experience. Ingenuity and research are your greatest weapons. You’ll scavenge materials, manipulate intricate machinery, and engage with analog systems requiring careful calibration and hands-on interaction. Planning is key, choose wisely or suffer the consequences. There’s no ‘one solution’; instead, the goal is what you can make of a situation.

The moon base Samsara is a vast, interconnected labyrinth built atop the ruins of a failed mining colony and an opulent hotel lost to time. Now, it’s a domain carved up by philosophical factions, where science bleeds into faith. Venture through repurposed spaces where the surreal becomes captivating; labs built in lavish casinos and dramatic theatre stages; experiments set up in emptied pools; strange machines built in ancient moon caves, and much more. Every corner of Samsara tells a story, and every story has something hiding beneath the surface, waiting to be found…
How much does ONTOS for PC cost right now?
ONTOS for PC starts at €50.37 (€52.56 with fees) at Key4Games, a shared account.
That €50.37 (€52.56 with fees) already includes the GOCDKEYS16 coupon, so apply it at checkout or the store will show you a higher price.
Just 2 stores stock it, 2 offers in all, so there is little here to push the price either way.
Are these stores safe to buy ONTOS from?
One caveat worth €0.02 (€0.10 with fees): the €50.37 (€52.56 with fees) at Key4Games is the cheapest, but that store carries only 37 Trustpilot reviews, so there is barely any track record behind it. Difmark sells the same shared account for €50.39 (€52.66 with fees) — €0.02 (€0.10 with fees) more — backed by 14.2k reviews and a 4.1 out of 5, which is a small premium for a seller thousands of buyers have already tested.
Can you activate ONTOS in US?
All 2 offers are Global, so the code redeems on any account no matter where it was created.
So, which ONTOS deal should you buy?
There is no key on the list, so the €50.37 (€52.56 with fees) account at Key4Games is the only route — just remember the game lives on the seller's credentials.
Most common FAQs when buying ONTOS for PC in digital format:
Other stores may take 30–40 minutes depending on game availability. On release days, delivery times may be slightly longer.
If you notice an unusually long delay, contact the store or us, and we’ll resolve it as quickly as possible.
There have been occasions when those services were overwhelmed, which is why we also offer 24/7 customer support to help resolve any issues or questions.
In any case, we always offer a 100% guarantee, so you won’t have any problems, and if you do, we’ll resolve them as soon as possible.
Need more help? Use our FAQs.
ONTOS
Is it worth it?
What the press says
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Overall, Oneiros has proven to be a satisfying and enjoyable puzzle game to unwind with. The worlds are beautifully rendered, the puzzles are complex and... Read more
About the game
* languages with full audio
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Requirements
- Requires a 64-bit processor and operating system
- Additional Notes: To Be Confirmed / À confirmer / Da confermare / Wird noch bestätigt / Por confirmar / 有待確認 / 有待确认 / 確認中 / 추후 확정 / Nog te bevestigen / Skal bekræftes / Skal bekreftes / Vahvistetaan myöhemmin / Att bekräftas / Henüz onaylanmadı / รอยืนยัน / Підтверджується / Будет подтверждено / Do potwierdzenia / A confirmar
- Requires a 64-bit processor and operating system
- Additional Notes: To Be Confirmed / À confirmer / Da confermare / Wird noch bestätigt / Por confirmar / 有待確認 / 有待确认 / 確認中 / 추후 확정 / Nog te bevestigen / Skal bekræftes / Skal bekreftes / Vahvistetaan myöhemmin / Att bekräftas / Henüz onaylanmadı / รอยืนยัน / Підтверджується / Будет подтверждено / Do potwierdzenia / A confirmar
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