Buy Serum Steam Key
Serum Steam Key: compare prices from 28 offers (October 2026)
A Serum 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 €3.82 (no fees, -85%) at GamesPlanet, 85% below the €24.99 (no fees) Steam price · 13 verified stores, 28 offers in stock · Updated 28min ago.
Prices change depending on the selected payment method.
Final prices with fees
About Serum
Unravel the mystery of Serum and survive the fight against time amidst a ruined world of destruction and mutated creatures.Your life is at stake! The toxic fog obscures the dangers in an apocalyptic world where every second counts. A relentless timer on your arm decides between life and death. Prove your courage, explore the mysterious environment for resources and brew serums for unique abilities. Every dose of serum can make the difference in the fight for survival against mutated enemies. Find shelter in the chaos, search for technology and modify weapons for greater effectiveness. The race against time begins now.
Unravel the mystery of Serum and find your way out while exploring different biomes and their unique characteristics. Find clues about past events and use the new-found wisdom to survive while experiencing beautiful graphics delivered with the power of Unreal Engine 5.
Figure out how to create new tools, traps, and weapons. Gather Serum from animals and plants and expand your safe zone to create a sustainable source of the substance. Prepare wisely for your next excursion to ensure it won’t be your last one.
Take advantage of a unique brewing mechanism that allows you to create various mixtures of Serum. Experiment with dozens of combinations and use them to enhance your abilities. Ensure you’re carrying enough to get you out of a tough spot.
Clash with various creatures using a multitude of weapons: melee, ranged, and throwing including spears, bows and clubs. Use Serum to infuse and modify your weapons and gain the upper hand against mutated abominations that roam the island.
Endure in a hostile environment under the pressure of time. Manage your health, stamina, and beware of Serum side effects.
How much does Serum for PC cost right now?
Serum for PC starts at €3.82 (no fees) at GamesPlanet, a Steam key, which is 85% under the €24.99 (no fees) it costs on the official store.
With 28 offers across 13 stores there is enough competition for the price to move, so the gap between the cheapest and the rest is worth checking before you buy.
It is €0.10 away from its all-time low (€3.72, back in September 2026).
Steam Key
Steam Gift
Is it worth buying the Steam Key for Serum now or waiting?
That €3.82 (no fees) key is at one of its best prices.
- Those €3.82 (no fees) are 26% below what it usually costs, measured on the store price.
- 12 stores sell the Steam Key at the same time, and with that much competition the price moves almost daily.
- Not counting today, only 19 days out of the 343 days on record were this cheap or cheaper; the lowest it has ever cost is €3.72.
Worked out from 2,387 daily records of the Steam Key for Serum across 13 stores. See the full price history.
The price does not include each store's payment fees. The percentage is measured on the store price, without coupons, because that is how we record the history. The analysis only counts Key offers. Shared accounts, Steam Gift and physical editions stay out, because they are not the same product and their prices move differently.
Which Serum format should you buy?
By format: Steam Key from €3.82 (no fees) and Steam Gift from €30.71 (€31.00 with fees).
Which Serum editions are on sale?
Beyond the standard edition at €3.82 (no fees), there is the Ultimate at €8.39 (no fees) at Cdkeys Com, €4.57 more and the Supporter at €13.82 (€15.55 with fees) at Eneba, €10.00 (€11.73 with fees) more. Check on the store what each one adds before paying the difference.
Can you activate Serum in US?
24 of the 28 offers work on US — the Global ones plus the ones issued for your own region.
Why is there such an expensive Serum offer?
One listing is worth ignoring: the Steam key that GamersGate has at €34.99 (no fees) is more than 9 times the cheapest offer and is not what this game costs. The number to work from is €3.82 (no fees) at GamesPlanet.
Most common FAQs when buying Serum 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.
Serum
Is it worth it?
- 45%Steam reviewsMixed · 254 reviews
- 5.0/5GoCDKeys users1 ratings →
About the game
* languages with full audio
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Requirements
- Requires a 64-bit processor and operating system
- Windows 10 (x64)
- Intel Core i5-8400 or AMD Ryzen 5 2600X
- 12 GB RAM
- NVIDIA GeForce GTX 1070, 8 GB or AMD Radeon RX Vega 56, 8 GB or Intel Arc A750, 8 GB
- Version 11
- 15 GB available space
- Sound Card: DirectX compatible
- Additional Notes: Low settings, 1080p @ 30 FPS. CPU must support at least the SSE3 instruction set. Does not require the AVX instruction set.
- Requires a 64-bit processor and operating system
- Windows 10 (x64)
- Intel Core i5-10400 or AMD Ryzen 5 3600X
- 16 GB RAM
- NVIDIA GeForce RTX 3060 Ti, 8 GB or AMD Radeon RX 6600 XT, 8 GB
- Version 11
- 15 GB available space
- Sound Card: DirectX compatible
- Additional Notes: High settings, 1080p @ 60 FPS. CPU must support at least the SSE3 instruction set. Does not require the AVX instruction set.
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What do our users think of Serum for PC Digital?
A futuristic FPS with attractive visuals, solid controls and combat based customization. Travel through neon illuminated labs, tweak load outs to your liking, and unleash grenades and technology-based powers. The gunplay was enough to keep my attention, but there is a noteworthy thin amount of story and while I found it fun, it probably would not hold up too long for action sessions.
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