Complete any level in single player.
Kill an enemy with a gib torn from another enemy.
Rescue professor Stein. So to say.
Complete the single player campaign.
Complete the game in single player on unmodified serious difficulty.
Complete the game in single player in half the estimated time on each level.
Remove 10 Gnaar eyes.
Rip out 10 Rocketeer hearts.
Break 10 Soldier necks.
Tear off 10 Kleer heads.
Squash 10 Hatchling spiders.
Rip 10 Juvenile spiders apart.
Break 5 Arachnoid necks.
Rip Scrapjack's head off.
Kill the kicked enemy while it is still in the air.
Kill 3 enemies in one sprint with the Sledgehammer.
Complete the game in single player without manually reloading, aiming or sprinting.
Kill at least 5 headless kamikazes in one explosion.
Perform all possible finishing moves in the game.
Kill 20 enemies with the Minigun without releasing the trigger.
Decipher an Egyptian text.
Decipher all Egyptian texts.
Secure the bird.
Solve the riddle of the Sphynx.
Kill a Witch-Bride of Achriman.
Power up the Timelock.
Awake the Guardian of Time.
Use the Mutilator to surf after a Werebull.
Pierce 5 enemies with one Devastator round.
Gib 20 enemies from close range with a shotgun.
Kill an enemy using the Mutilator.
Decapitate a Khnum.
Smash 20 Kleers with the Sledgehammer.
Kill at least 3 enemies in one spinning Sledgehammer attack.
Kill 5 Cave Demons while they're in air.
Blow a Major Biomechanoid into pieces.
Find at least 50 secrets in single player.
Find all secrets in single player.
Find Sam's classic outfit
Complete The Guardian of Time in single player on serious difficulty without dying or loading.
Find the Vista secret.
Complete any level in cooperative with at least 2 players.
Complete the campaign in cooperative with at least 2 players.
Complete a Coin-op cooperative game on normal or higher difficulty.
Pick up at least 10 extra life items.
Pick up 100 gold coins.
Complete a deathmatch game with at least 1 frag.
Win 10 deathmatch games.
Win a versus match.
Frag 20 players with the Sledgehammer.
Complete a Beast Hunt match
Score a total of 10 points in CTF matches.
Make at least 3 kills in one Instant Kill match.
Win one round in Last Man Standing game with at least 4 players.
Win one My Burden match with at least 3 players.
Earn a medal in Survival.
Earn a gold medal in Survival.
Complete the Jewel of The Nile single player campaign.