Destroy the Machine Gun.
Recruit 3 Assassins.
Play once as each class (min 2 min)
Win a match in Table Tennis
Win a match of Volleyball
Win a full contest in Track & Field
Perform a windmill manoeuvre in Long Jump
Win a match in Boxing
Win a match in Football
Win a match with a smash in Table Tennis
Score a point from a perfect bump, set & super spike in Volleyball
Take 3 Pictures at end of the Welcome Tutorial.
Score 3 Perfect Touchdowns in a row in the Running Back challenge.
Discover the Shrine in the Catacombe di Roma.
Complete DNA Sequence 3.
Complete DNA Sequence 2.
Discover the Shrine in the Terme di Traiano.
Find a secure place to hide and re-enter the Animus.
Complete DNA Sequence 1.
Singleplayer: Finish the game on Easy, Normal or Hard
Singleplayer: Finish all of Dante's missions
Singleplayer: Complete Rescue the Rescuers
Reach level 2 in any class
See a photo get taken
Have a friend join you while playing an activity or challenge
Attempt to access DNA Sequence 9 for the first time.
Singleplayer: Finish all of Rabbit's missions
Singleplayer: Complete Neptune's Net
Singleplayer: Complete Compromised
Singleplayer: Finish all of Deuce's missions
Singleplayer: Complete Friends From Afar
Singleplayer: While long range sniping, hit one of every bodypart
Singleplayer: Complete Gunfighters
Singleplayer: Complete Belly of the Beast
Singleplayer: Complete Dorothy's a Bitch
Singleplayer: Complete Running with Wolves...
Singleplayer: Complete Breaking Bagram
Singleplayer: In Breaking Bagram, destroy 2 vehicles with a single 2000 lb Laser Guided Bomb
Singleplayer: Complete First In
Singleplayer: In First In, Kill the Hostage Taker with a Head Shot
Play online for 15 minutes
Play Team Assault
Singleplayer: Jump 7.5 meters high on the ATV
Access the terminal and battle the forces of the Cosmic Silverback in Dead Ops Arcade.
Continue playing to unlock this secret achievement.
Rack up a body count of 20 NVA using air support in Hue City.
Deliver 50 headshots.
Complete Act I.
Shoot an enemy through a wall.
Kill 2 enemies with one grenade.