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