| icon | info | gamerscore |
|---|---|---|
 | Are You Serious!? Complete TFE, TSE or BFE single player campaign on serious difficulty | 100 |
 | It's not the size that matters... Finish Serious Sam: The First Encounter | 60 |
 | Forgive me father, for I have sinned Finish Serious Sam: The Second Encounter | 60 |
 | That's how we do it on planet Earth Finish Serious Sam 3: BFE campaign | 60 |
 | Air Element Obtain the Air Element. | 10 |
 | Earth Element Obtain the Earth Element. | 10 |
 | Fire Element Obtain the Fire Element. | 10 |
 | Water Element Obtain the Water Element. | 10 |
 | Huge Pile of Lava Defeat the Lava Golem boss on Alley of the Sphinxes. | 10 |
 | Hey! That's cheating! Trigger Ugh-Zan's regeneration on The Great Pyramid. | 10 |
 | Quick Draw Pull out a single Colt and immediately deliver a killing shot. | 30 |
 | Wall of Bullets Kill 20 enemies with the Minigun without releasing the trigger. | 15 |
 | Cannon Expert Pierce at least 10 enemies with a single cannonball. | 20 |
 | Leap of Faith Leap into the unknown on Luxor. | 20 |
 | Serious Beginner Complete any level in single player. | 10 |
 | Look Ma, I'm a Lumberjack! Cut down some trees. | 10 |
 | Treasure Diving Find a secret under water. | 10 |
 | Nice Try Use the Flamethrower on a Lava Golem. | 10 |
 | Mine's bigger than yours Destroy an enemy cannon with your own cannon. | 20 |
 | The Perfect Storm Survive the storm on the Grand Cathedral. | 10 |
 | Make it count Kill at least 30 enemies with a single Serious Bomb. | 30 |
 | Serious Damage Kill 100 enemies with Serious Damage active. | 30 |
 | South America Master Complete the South America episode in single player or cooperative. | 10 |
 | Persia Master Complete the Persia episode in single player or cooperative. | 10 |
 | Medieval Master Complete the Medieval episode in single player or cooperative. | 10 |
 | Survivor Earn a gold medal on any level in single player Survival. | 20 |
 | The Beast Finish the Legend of the Beast campaign in single player or cooperative. | 30 |
 | Wanted Dead or Alive Rescue professor Stein. So to say. | 10 |
 | Get the hell off my ride! Secure the bird. | 10 |
 | Apprentice Egyptologist Decipher an Egyptian text. | 10 |
 | All Your Base Are Belong To Us Defeat the spaceship. | 10 |
 | Killer Jewelry Kill an enemy using the Mutilator. | 10 |
 | Problem solver Solve the riddle of the Sphynx. | 10 |
 | Useful Trophy Kill an enemy with a gib torn from another enemy. | 10 |
 | Painful Divorce Kill a Witch-Bride of Achriman. | 10 |
 | Trick Shot Kill the kicked enemy while it is still in the air. | 20 |
 | Mission completed Power up the Timelock. | 10 |
 | Detroit Steel Start the car. | 10 |
 | Classic Outfit Find Sam's classic outfit. | 30 |
 | The Doorman Should Wear a Suit Awake the Guardian of Time. | 10 |
 | Load of Scrap Rip Scrapjack's head off. | 15 |
 | Maintenance time Blow a Major Biomechanoid into pieces. | 15 |
 | Rodeo Surfer Use the Mutilator to surf after a Werebull. | 10 |
 | Jewel of the Nile Complete the Jewel of The Nile single player campaign. | 30 |
 | Look, it's a secret! Find at least 30 secrets in single player. | 40 |
 | Chain Explosion Kill at least 5 headless kamikazes in one explosion. | 30 |
 | Rrrrrrrrrr Kill 10 enemies with the Chainsaw without releasing the trigger. | 15 |
 | Trick or Treat Kill 50 Cucurbitos. | 10 |
 | Bug Hunt Squash 10 Hatchling spiders. | 10 |
 | Up Close and Personal Gib 20 enemies from close range with a shotgun. | 10 |
 | Circle of Death Kill at least 3 enemies in one spinning Sledgehammer attack. | 20 |
