Full list of all 51 Serious Sam: Siberian Mayhem achievements.
The base game contains 43 achievements, and there is 1 DLC pack containing 8 achievements.
From Russia with love
Complete Siberian Mayhem without learning a single S.A.M skill in Singleplayer
Defeat Sentry Tower with sole hoverboard firepower
Rise and levitate
Now it's your turn
Searched for the enemy, found new friends
Kill Draconian Burner with a Burner gun
...at least once
Kill 10 enemies with one Burner explosion
Embrace the origins
Find every General Brand audio log
Kill 5 enemies with one Crossbow shot
Through the snow, flames, and alien bodies
When passion overcomes the pain
The smartest man on Earth
A tooth for a truth
In Mother Russia, you invade the aliens!
Meet the naughty monster
Try a new career
Anything for a reward
Not the best way to keep warm
Back on the Big Land
No complaints. Only skills
No hope for a hopping mob
Set your spirit free
When passion becomes profession
A solution to any problem
You are here to shoot, right?
From granny, with love
Hey, this looks familiar!
Find every Dmitry audio and text log
Find all of the print media notes
Stay here and kill them all... with a black hole
Kill 30 enemies while riding one Draconian Burner
Complete the mech sequence and kill all big enemies without shooting
Don't ride the tank - become the tank
Beat the final boss in Singleplayer on Serious difficulty without loading mid-battle savegames
Complete Siberian Mayhem on Serious difficulty in Singleplayer
Complete Siberian Mayhem on Serious difficulty in Cooperative with enemy multiplier set to at least x2
Rid the monster of its misery
Find half of all the secrets
Find all secrets
Unlock all Achievements.
Get any medal on Castle of Pain survival level
Get any medal on Horus Sanctuary survival level
Get any medal on Kleer Fortress survival level
Get any medal on Dragon Gates survival level
Get any medal on The Snowrider survival level
Get any medal on Monkey Canyon survival level
Get a gold medal on any survival level