PC

Serious Sam: Siberian Mayhem Steam Key

Serious Sam: Siberian Mayhem

Serious Sam: Siberian Mayhem is a new stand-alone expansion to the world of the classic FPS series. Join the fight against Notorious Mental on a journey through the wild lands of Russia, and find your way through this lost chapter of Sam Stone's adventures.

Windows PC  Action

51 Steam Achievements

Black Gold
Black Gold

The Refinery
The Refinery

Energize
Energize

The Processing
The Processing

Hide and Seek
Hide and Seek

Heart of Russia
Heart of Russia

Alpha and Omega
Alpha and Omega

The Last Train Departed
The Last Train Departed

The End
The End

Extremely Uncool
Extremely Uncool

The Operator
The Operator

Dogs and Frogs
Dogs and Frogs

Eye for an Eye
Eye for an Eye

Inborn Plumber
Inborn Plumber

The Dark Tower
The Dark Tower

All Ingenious is Shot
All Ingenious is Shot

A solution to any problem

All Ingenious is Simple
All Ingenious is Simple

The smartest man on Earth

All Ingenious is Hard
All Ingenious is Hard

Sweet Kompot
Sweet Kompot

Serious Archaeologist
Serious Archaeologist

More Complaints
More Complaints

Find every Dmitry audio and text log

Breaking News
Breaking News

Find all of the print media notes

Traitor's Tale
Traitor's Tale

Find every General Brand audio log

Death from Above
Death from Above

Now it's your turn

Back To The Future
Back To The Future

Rise and levitate

David and Goliath
David and Goliath

Defeat Sentry Tower with sole hoverboard firepower

Hole-in-One
Hole-in-One

Stay here and kill them all... with a black hole

Critical Temperature
Critical Temperature

Kill 10 enemies with one Burner explosion

Fight Fire with Fire
Fight Fire with Fire

Kill Draconian Burner with a Burner gun

Combustion Tamer
Combustion Tamer

Kill 30 enemies while riding one Draconian Burner

Line up, please!
Line up, please!

Kill 5 enemies with one Crossbow shot

Look Ma, I'm a Lumberjack!
Look Ma, I'm a Lumberjack!

Complete the mech sequence and kill all big enemies without shooting

Iron Caput
Iron Caput

Don't ride the tank - become the tank

Veni, Vidi, Vici
Veni, Vidi, Vici

Beat the final boss in Singleplayer on Serious difficulty without loading mid-battle savegames

Old School
Old School

Complete Siberian Mayhem without learning a single S.A.M skill in Singleplayer

Serious Mayhem
Serious Mayhem

Complete Siberian Mayhem on Serious difficulty in Singleplayer

Massacre Party
Massacre Party

Complete Siberian Mayhem on Serious difficulty in Cooperative with enemy multiplier set to at least x2

Oops, I dropped it
Oops, I dropped it

Rid the monster of its misery

Everyone Is A Minesweeper
Everyone Is A Minesweeper

Ok, And?
Ok, And?

Sam The Explorer
Sam The Explorer

Find half of all the secrets

No Stone Unturned
No Stone Unturned

Find all secrets

Part-Time Hero
Part-Time Hero

Get half of all achievements

Here Comes the Pain
Here Comes the Pain

Get any medal on Castle of Pain survival level

Hero-glyphic
Hero-glyphic

Get any medal on Horus Sanctuary survival level

Superior Species
Superior Species

Get any medal on Kleer Fortress survival level

Feng Shui Fight
Feng Shui Fight

Get any medal on Dragon Gates survival level

Aurora Borealis
Aurora Borealis

Get any medal on The Snowrider survival level

Welcome to the Jungle
Welcome to the Jungle

Get any medal on Monkey Canyon survival level

Extreme Survivalist
Extreme Survivalist

Get a gold medal on any survival level

Hero
Hero

Unlock all Achievements.

  • Single-Player
  • Multi-Player
  • Co-op mode
  • Online Co-op
  • Steam Achievements
  • Full Controller Support
  • Steam Trading Cards
  • Steam Workshop
  • Steam Cloud
  • Incl. Level-Editor