Serious Sam
30Complete the game in single player on serious difficulty.
Unlocked: 27 Jul 2013 21:45:50
Complete Metropolis level in single player on serious difficulty without loading.
Unlocked: 27 Jul 2013 15:52:50
Find at least 50 secrets in single player.
Unlocked: 27 Jul 2013 03:41:37
Perfect Kill
10Kill all enemies in Karnak in single player.
Unlocked: 26 Jul 2013 20:45:54
Co-op Hippie
10Complete The Great Pyramid in co-op with blood option set to hippie.
Unlocked: 17 Jun 2013 17:37:10
Complete a co-op game on serious difficulty and extra enemy strength on 400%.
Unlocked: 17 Jun 2013 17:37:10
Game Master
20Complete the game.
Unlocked: 15 Jun 2013 20:49:37
Complete the game in single player without firing a single bullet or shell.
Unlocked: 15 Jun 2013 20:49:37
Serious Run
15Complete the game in single player by beating estimated time on each level.
Unlocked: 15 Jun 2013 20:49:37
Pierce at least 10 enemies with a single cannonball.
Unlocked: 15 Jun 2013 20:20:07
Complete any level in single player.
Unlocked: 15 Jun 2013 17:53:52
Complete any level in co-op.
Unlocked: 15 Jun 2013 01:50:39