Are You Serious!?
Complete the game in single player on unmodified serious difficulty.
30 
Serious Sam
Complete the single player campaign.
20 
Jewel of the Nile
Complete the Jewel of The Nile single player campaign.
20 
Look, it's a secret
Find at least 50 secrets in single player.
15 
The doorman should wear a suit
Awake the Guardian of Time.
10 
Co-op Master
Complete the campaign in cooperative with at least 2 players.
10 
Headsman
Decapitate a Khnum.
10 
Chain Explosion
Kill at least 5 headless kamikazes in one explosion.
10 
Classic Outfit
Find Sam's classic outfit.
10 
Deathmatch Master
Win 10 deathmatch games.
10 
Flag Thief
Score a total of 10 points in CTF matches.
10 
Kung-fu Fighter
Perform all possible finishing moves in the game.
10 
Wanted Dead or Alive
Rescue professor Stein. So to say.
10 
Get the hell off my ride!
Secure the bird.
10 
Problem solver
Solve the riddle of the Sphynx.
10 
Mission completed
Power up the Timelock.
10 
Serious Beginner
Complete any level in single player.
5 
Killer Jewelry
Kill an enemy using the Mutilator.
5 
Bone Crusher
Smash 20 Kleers with the Sledgehammer.
5 
Maintenance time
Blow a Major Biomechanoid into pieces.
5 
Trick Shot
Kill the kicked enemy while it is still in the air.
5 
Load of Scrap
Rip Scrapjack's head off.
5 
Wall of Bullets
Kill 20 enemies with the Minigun without releasing the trigger.
5 
Look Ma, I won!
Win a versus match.
5 
Instant Killer
Make at least 3 kills in one Instant Kill match.
5