Game Master
Complete the game.
20 ✓ January 20th, 2010
Serious Run
Complete the game in single player by beating estimated time on each level.
15 ✓ January 20th, 2010
Serious Beginner
Complete any level in single player.
10 ✓ January 18th, 2010
I am Invincible
Complete the game in single player without firing a single bullet or shell.
10 ✓ January 20th, 2010
Co-op Hippie
Complete The Great Pyramid in co-op with blood option set to hippie.
10 ✓ January 28th, 2010
Cannon Expert
Pierce at least 10 enemies with a single cannonball.
5 ✓ January 1st, 1753
Co-op Beginner
Complete any level in co-op.
5 ✓ January 19th, 2010
Serious Co-op
Complete a co-op game on serious difficulty and extra enemy strength on 400%.
35 
Serious Sam
Complete the game in single player on serious difficulty.
30 
Look, It's a Secret
Find at least 50 secrets in single player.
30 
Metropolis King
Complete Metropolis level in single player on serious difficulty without loading.
20 
Perfect Kill
Kill all enemies in Karnak in single player.
10