Serious Beginner
Complete any level in single player.
Game Master
Complete the game.
Serious Sam
Complete the game in single player on serious difficulty.
Serious Run
Complete the game in single player by beating estimated time on each level.
Cannon Expert
Pierce at least 10 enemies with a single cannonball.
Perfect Kill
Kill all enemies in Karnak in single player.
Look, it's a secret
Find at least 50 secrets in single player.
Metropolis King
Complete Metropolis level in single player on serious difficulty without loading.
I am invincible
Complete the game in single player without firing a single bullet or shell.
Co-op Beginner
Complete any level in co-op.
Co-op Hippy
Complete The Great Pyramid in co-op with blood option set to hippy.
Serious Co-op
Complete a co-op game on serious difficulty and extra enemy strength on 400%.
Rocket Jumper
Perform 100 rocket jumps.
Look Ma, I won!
Win a deathmatch.
Deathmatch Master
Win 100 deathmatch games.
Deathmatch Champion
Win 1000 deathmatch games.
Deathmatch Veteran
Complete 100 deathmatches.
Deathmatch Duelist
Win 25 1-on-1 deathmatches.
Untouchable
Win an at least 4 player deathmatch by reaching frag limit of at least 25 without dying.
Fragger
Frag a total of 100 players.
Crazy Fragger
Frag a total of 500 players.
Serious Fragger
Frag a total of 1000 players.
1337 Fragger
Frag a total of 1337 players.
Desperate Fragger
Frag 25 players with a knife while having no more than 10 health left.
Butcher
Frag 100 players with a knife.
Swordsman
Frag 100 players in a knife-to-knife fight.
Backstabber
Frag 100 players with a knife from behind.
Diverse Fragger
Frag 100 different players in deathmatch.
Deathmatch Marathon
Complete a deathmatch with frag limit set to at least 200. (Frag limit must be reached!)
Deathmatch Marathon Winner
Win a deathmatch marathon.
Grudge
Frag the same player 5 times in a row in at least 4 player deathmatch.
Nemesis
Frag the same player 10 times during a single round in at least 4 player deathmatch.
Frag Combo
Perform 4 frags with each being no more than 10 seconds apart from the previous frag in at least 4 player deathmatch.
Royal Frag Combo
Frag all players in a single frag combo.
Swimming Instructor
Drown an enemy.