Complete the game in single player on unmodified serious difficulty.
Complete the campaign in cooperative with at least 2 players.
Find at least 50 secrets in single player.
Decapitate a Khnum.
Kill the kicked enemy while it is still in the air.
Find Sam's classic outfit.
Complete the single player campaign.
Awake the Guardian of Time.
Power up the Timelock.
Kill 20 enemies with the Minigun without releasing the trigger.
Kill an enemy using the Mutilator.
Perform all possible finishing moves in the game.
Rip Scrapjack's head off.
Blow a Major Biomechanoid into pieces.
Solve the riddle of the Sphynx.
Secure the bird.
Smash 20 Kleers with the Sledgehammer.
Rescue professor Stein. So to say.
Complete any level in single player.
Kill at least 5 headless kamikazes in one explosion.
Complete the Jewel of The Nile single player campaign.
Win a versus match.
Win 10 deathmatch games.
Score a total of 10 points in CTF matches.
Make at least 3 kills in one Instant Kill match.
