Serious Sam: Siberian Mayhem
Harris's Progress
Black Gold
The Refinery
Energize
The Processing
Hide and Seek
Heart of Russia
Alpha and Omega
The Last Train Departed
The End
Extremely Uncool
The Operator
Dogs and Frogs
Eye for an Eye
Inborn Plumber
The Dark Tower
All Ingenious is Shot
A solution to any problem
All Ingenious is Simple
The smartest man on Earth
All Ingenious is Hard
Sweet Kompot
Serious Archaeologist
More Complaints
Find every Dmitry audio and text log
Breaking News
Find all of the print media notes
Traitor's Tale
Find every General Brand audio log
Death from Above
Now it's your turn
Back To The Future
Rise and levitate
David and Goliath
Defeat Sentry Tower with sole hoverboard firepower
Hole-in-One
Stay here and kill them all... with a black hole
Critical Temperature
Kill 10 enemies with one Burner explosion
Fight Fire with Fire
Kill Draconian Burner with a Burner gun
Combustion Tamer
Kill 30 enemies while riding one Draconian Burner
Line up, please!
Kill 5 enemies with one Crossbow shot
Look Ma, I'm a Lumberjack!
Complete the mech sequence and kill all big enemies without shooting
Iron Caput
Don't ride the tank - become the tank
Veni, Vidi, Vici
Beat the final boss in Singleplayer on Serious difficulty without loading mid-battle savegames
Old School
Complete Siberian Mayhem without learning a single S.A.M skill in Singleplayer
Serious Mayhem
Complete Siberian Mayhem on Serious difficulty in Singleplayer
Massacre Party
Complete Siberian Mayhem on Serious difficulty in Cooperative with enemy multiplier set to at least x2
Oops, I dropped it
Rid the monster of its misery
Everyone Is A Minesweeper
Ok, And?
Sam The Explorer
Find half of all the secrets
No Stone Unturned
Find all secrets
Part-Time Hero
Get half of all achievements
Here Comes the Pain
Get any medal on Castle of Pain survival level
Hero-glyphic
Get any medal on Horus Sanctuary survival level
Superior Species
Get any medal on Kleer Fortress survival level
Feng Shui Fight
Get any medal on Dragon Gates survival level
Aurora Borealis
Get any medal on The Snowrider survival level
Welcome to the Jungle
Get any medal on Monkey Canyon survival level
Extreme Survivalist
Get a gold medal on any survival level
Hero
Unlock all Achievements.