Serious Co-op
Complete a co-op game on serious difficulty and extra enemy strength on 400%.
35 ✓ May 6th, 2010
Game Master
Complete the game.
20 ✓ January 24th, 2010
Metropolis King
Complete Metropolis level in single player on serious difficulty without loading.
20 ✓ March 20th, 2010
Serious Run
Complete the game in single player by beating estimated time on each level.
15 ✓ March 4th, 2010
Serious Beginner
Complete any level in single player.
10 ✓ January 16th, 2010
I am Invincible
Complete the game in single player without firing a single bullet or shell.
10 ✓ January 24th, 2010
Co-op Hippie
Complete The Great Pyramid in co-op with blood option set to hippie.
10 ✓ March 4th, 2010
Cannon Expert
Pierce at least 10 enemies with a single cannonball.
5 ✓ January 20th, 2010
Co-op Beginner
Complete any level in co-op.
5 ✓ January 16th, 2010
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 
Perfect Kill
Kill all enemies in Karnak in single player.
10