Serious Sam HD: The First Encounter Achievements for Xbox 360
There are 12 achievements for Serious Sam HD: The First Encounter (Xbox 360) worth 200 points
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Pierce at least 10 enemies with a single cannonball.
Complete any level in co-op.
Complete The Great Pyramid in co-op with blood option set to hippie.
I am Invincible
Complete the game in single player without firing a single bullet or shell.
Kill all enemies in Karnak in single player.
Complete any level in single player.
Complete the game in single player by beating estimated time on each level.
Complete the game.
Complete Metropolis level in single player on serious difficulty without loading.
Look, It's a Secret
Find at least 50 secrets in single player.
Complete the game in single player on serious difficulty.
Complete a co-op game on serious difficulty and extra enemy strength on 400%.