A Serious Sam Siberian Mayhem 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 €5.20 (-73%) at Gameseal, 73% below the €19.50 Steam price · 9 verified stores, 12 offers in stock · Updated 08h 21min ago.
Serious Sam Siberian Mayhem for PC starts at €5.20 at Gameseal, a Steam key, which is 73% under the €19.50 it costs on the official store.
That €5.20 already includes the SEAL17CDK coupon, so apply it at checkout or the store will show you a higher price.
With 12 offers across 9 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 €0.33 away from its all-time low (€4.87, back in June 2026).
That €5.20 key is at its usual price: no bargain, no spike.
Worked out from 2,306 daily records of the Steam Key for Serious Sam Siberian Mayhem across 19 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.
By format: Steam Key from €5.20 and Steam Gift from €20.06.
10 of the 12 offers work on US — the Global ones plus the ones issued for your own region.
38 outlets reviewed it and it averages 73 out of 100, with 56% recommending it.
Critics Rating
Player Rating
Fair
It’s a game that relishes in its proclivity for ridiculous violence and over-the-top set pieces, and considering you can mostly ignore the superfluous additions, what... Read more
Siberian Mayhem recalls Sam's glory days in the best way, providing a bombastic adventure that doesn't overstay its welcome. Read more
Serious Sam Siberian Mayhem distills the DNA of the series down into a series of long, brutally chaotic levels backed by an all-time peak of... Read more
Serious Sam: Siberian Mayhem is a standalone expansion that takes Sam Stone to the icy land of Siberia. The expansion introduces new weapons, enemies, and... Read more
It’s hard to pinpoint why this expansion just isn’t included into Serious Sam 4 as DLC, because it misses out on varied and complex modding... Read more
Siberian Mayhem keeps the experience fresh while sticking to the roots of what makes Serious Sam so great: ruthless alien-killing action with plenty of puns... Read more
A lean and mean addition to the Serious Sam family that experiments with a few new toys, and offers more of the same Serious Sam... Read more
Serious Sam: Siberian Mayhem is an excellent entry in the long-running series. Read more
The video game equivalent of being picked up in a 2000 F-250 by a guy blasting Skynyrd and yelling HELL YEAH BROTHER at everything you... Read more
Serious Sam: Sliberian Mayhem offers the similar carnage and heart-pounding action of its predecessors, with some cool new weapons to boot. Read more
Serious Sam: Siberian Mayhem adds directly to Serious Sam 4 without changing much. Despite being a standalone expansion, players should go through Serious Sam 4... Read more
Inevitably, Serious Sam: Siberian Mayhem doesn’t do much to attract newcomers to the series. It is what it is: an expansion designed to offer Serious... Read more
Serious Sam: Siberian Mayhem is more of the chaos, mayhem and classic one-liners, but some recurring issues from Serious Sam 4 reared their heads marring... Read more
Even as Siberian Mayhem quickly descends into chaos and sheer pandemonium, there’s always a final word to be had, or one last gunshot to haphazardly... Read more
Siberian Mayhem is an entertaining little jaunt for fans of Serious Sam 4. It’s a quick five levels to run through, and I wish it... Read more
Full of secrets, desolate and still somewhat gorgeous – Siberia might be the home of bloodshed you were missing in Serious Sam 4. All for... Read more
Siberian Mayhem improves on Serious Sam 4 in several areas, except where it mattered most: performance. The expansion's poor framerates and tech issues are a... Read more
Serious Sam - Siberian Mayhem is an insanely driving and cool action game that ends exactly when you already want to take a break from... Read more
If you have somehow enjoyed the base Serious Sam 4, you will most certainly enjoy Siberian Mayhem. It’s pretty much the same damn game, just... Read more
How much fun you’ll have in the bleak, frozen landscape depends on how much you are still smitten with mid-90s first-person shooter mechanics. Serious Sam... Read more
Ammunition-fueled ATV trips, Mech piloting sequences and taking down squid-operated choppers levels of insane action can’t save Serious Sam: Siberian Mayhem. No matter how varied... Read more
Serious Sam: Siberian Mayhem may have some decent gameplay, but the numerous technical issues really bring down the experience – massive frame drops, microstutters, and... Read more
A new Serious Sam game! And guess what? You get exactly what you'd expect! Siberian Mayhem is a mindless fragfest that does not overstay its... Read more
Serious Sam: Siberian Mayhem is another action-packed oldschool shooter with tons of enemies and interesting weaponry. Although the gameplay is good, minor bugs and design... Read more
Even though Serious Sam: Siberian Mayhem came out of nowhere, it offers exactly what we expect from the series nowadays. Shame about the hardware optimization... Read more
Serious Sam: Siberian Mayhem is a typical example of a shooter that is not for everyone. Read more
Serious Sam: Siberian Mayhem delivers what you'd expect from a quality DLC. It offers plenty of content and fun and addresses some of the original's... Read more
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