Perfect Kill
Not unlocked yetKill all enemies in Karnak in single player.
Rocket Jumper
Not unlocked yetPerform 100 rocket jumps.
Royal Frag Combo
Not unlocked yetFrag all players in a single frag combo.
Serious Beginner
Not unlocked yetComplete any level in single player.
Serious Co-op
Not unlocked yetComplete a co-op game on serious difficulty and extra enemy strength on 400%.
Serious Fragger
Not unlocked yetFrag a total of 1000 players.
Serious Run
Not unlocked yetComplete the game in single player by beating estimated time on each level.
Serious Sam
Not unlocked yetComplete the game in single player on serious difficulty.
Swimming Instructor
Not unlocked yetDrown an enemy.
Swordsman
Not unlocked yetFrag 100 players in a knife-to-knife fight.
Untouchable
Not unlocked yetWin an at least 4 player deathmatch by reaching frag limit of at least 25 without dying.