More achievements than you can shake an Antaresian Spider shell at...
Are You Serious!? - Complete the game in single player on unmodified serious difficulty.
Bone Crusher - Smash 20 Kleers with the Sledgehammer.
Chain Explosion - Kill at least 5 headless kamikazes in one explosion.
Classic Outfit - Find Sam's classic outfit.
Co-op Master - Complete the campaign in cooperative with at least 2 players
Get the hell off my ride! - Secure the bird.
Headsman - Decapitate a Khnum
Killer Jewelry- Kill an enemy using the Mutilator.
Kung-fu Fighter - Perform all possible finishing moves in the game.
Load of Scrap - Rip Scrapjack's head off.
Look, it's a secret - Find at least 50 secrets in single player.
Maintenance time - Blow a Major Biomechanoid into pieces.
Mission completed - Power up the Timelock.
Problem solver - Solve the riddle of the Sphynx.
Serious Beginner - Complete any level in single player.
Serious Sam - Complete the single player campaign.
The doorman should wear a suit - Awaken the Guardian of Time.
Trick Shot - Kill the kicked enemy while it is still in the air.
Wall of Bullets - Kill 20 enemies with the Minigun without releasing the trigger.
Wanted Dead or Alive - Rescue professor Stein. So to say.
Expect the same list for the PS3 trophies once the game arrives.