Wolfenk

Look Ma, I'm a Lumberjack!

Treasure Diving

Find a secret under water.

Nice Try

Mine's bigger than yours

Destroy an enemy cannon with your own cannon.

The Perfect Storm

Trick or Treat

Kill 50 Cucurbitos.

Rrrrrrrrrr

Kill 10 enemies with the Chainsaw without releasing the trigger.

Wall of Bullets

Kill 20 enemies with the Minigun without releasing the trigger.

Make it count

Kill at least 30 enemies with a single Serious Bomb.

Look, it's a secret!

Find at least 10 secrets in single player.

Burn Baby, Burn

Burn 100 enemies to death.

Serious Damage

Kill 100 enemies with Serious Damage active.

Crunchy

Kill 100 Kleers with the Cannon.

Bird Hunter

Kill 20 Harpies with the Sniper rifle.

Space Marine

Kill 200 enemies with the Laser gun.

Serious Beginner

Complete any level in single player.

Serious Sam

Complete the game.

Serious Run

Complete the game in single player by beating the estimated time on each level.

Are You Serious?

Complete the game in single player on unmodified serious difficulty.

Co-op Beginner

Complete any level in co-op.

South America Master

Complete the South America episode in single player or cooperative.

Persia Master

Complete the Persia episode in single player or cooperative.

Medieval Master

Complete the Medieval episode in single player or cooperative.

Co-op Survivor

Earn a gold medal on any level in cooperative Survival.

Survivor

Earn a gold medal on any level in single player Survival.

Look Ma, I won!

Win a versus match.

Fragger

Frag a total of 100 players.

The Beast

Finish the Legend of the Beast campaign in single player or cooperative.