Serious Beginner Complete any level in single player. Serious Sam Complete the single player campaign. Are You Serious!? Complete the game in single player on unmodified serious difficulty. Serious Run Complete the game in single player in half the estimated time on each level. Ophthalmologist Remove 10 Gnaar eyes. Cardiac Surgeon Rip out 10 Rocketeer hearts. Chiropractor Break 10 Soldier necks. Kleer Wrestler Tear off 10 Kleer heads. Bug Hunt Squash 10 Hatchling spiders. Arachnophobia Rip 10 Juvenile spiders apart. Scorpion Slayer Break 5 Arachnoid necks. Load of Scrap Rip Scrapjack's head off. Trick Shot Kill the kicked enemy while it is still in the air. Useful Trophy Kill an enemy with a gib torn from another enemy. Berserker Kill 3 enemies in one sprint with the Sledgehammer. Old School Complete the game in single player without manually reloading, aiming or sprinting. Chain Explosion Kill at least 5 headless kamikazes in one explosion. Kung-fu Fighter Perform all possible finishing moves in the game. Wall of Bullets Kill 20 enemies with the Minigun without releasing the trigger. Apprentice Egyptologist Decipher an Egyptian text. Master Egyptologist "Decipher all Egyptian texts." Wanted Dead or Alive Rescue professor Stein. So to say. Get the hell off my ride! Secure the bird. All Your Base Are Belong To Us! REDACTED: SPOILER Problem Solver Solve the riddle of the Sphynx. Painful Divorce Kill a Witch-Bride of Achriman. Mission completed Power up the Timelock. Detroit Steel REDACTED: SPOILER The doorman should wear a suit Awake the Guardian of Time. Rodeo Surfer Use the Mutilator to surf after a Werebull. Skewer Pierce 5 enemies with one Devastator round. Up Close and Personal Gib 20 enemies from close range with a shotgun. Killer Jewelry Kill an enemy using the Mutilator. Headsman Decapitate a Khnum. Bone Crusher Smash 20 Kleers with the Sledgehammer. Circle of death Kill at least 3 enemies in one spinning Sledgehammer attack. Clay Pigeons Kill 5 Cave Demons while they're in air. Maintenance time Blow a Major Biomechanoid into pieces. Look, it's a secret Find at least 50 secrets in single player. Top Secret Find all secrets in single player. Classic Outfit Find Sam's classic outfit Queen Hatshepsut Complete The Guardian of Time in single player on serious difficulty without dying or loading. Vista Find the Vista secret. Co-op Beginner Complete any level in cooperative with at least 2 players. Co-op Master Complete the campaign in cooperative with at least 2 players. Coin-op Co-op Complete a Coin-op cooperative game on normal or higher difficulty. Life Saver Pick up at least 10 extra life items. Gold Rush Pick up 100 gold coins. Deathmatch Beginner Complete a deathmatch game with at least 1 frag. Deathmatch Master Win 10 deathmatch games. Look Ma, I won! Win a versus match. Hammer Time Frag 20 players with the Sledgehammer. Beast Hunter Complete a Beast Hunt match Flag Thief Score a total of 10 points in CTF matches. Instant Killer Make at least 3 kills in one Instant Kill match. Last Man Standing Win one round in Last Man Standing game with at least 4 players. Heavy Weight Champion Win one My Burden match with at least 3 players. Survivor Earn a medal in Survival. Golden Survivor Earn a gold medal in Survival.