PlayStation 39 out of 67
Opened 50 chests.
Xbox 360 Action38 out of 63
Lock 'n' Load
Unlock all unique co-op weapons
Xbox 360 Action31 out of 44
Escape the Forerunner facility on the level 343 Guilty Spark in 21 minutes or less.
Xbox 360 Action70 out of 82
As RAAM, made sure Minh never forgets that day outside the House of Sovereigns.
Xbox 360 Action50 out of 69
Anniversary Earned 3 headshots in a row in a matchmade game.
Xbox 360 Adventure20 out of 20
When Pigs Fly
Use a saddle to ride a pig, then have the pig get hurt from fall damage while riding it.
Xbox 360 Action5 out of 59
Continue playing to unlock this secret achievement.
Xbox 360 Action21 out of 58
Play in a co-op team of 4 different playable characters.
Xbox 36042 out of 75
Bounty of 1000 gold in all nine holds
Xbox 360 Strategy2 out of 12
Make a word worth at least 20 points.
PlayStation 3 Action9 out of 38
Repair temporal damage caused by Dr. Nefarious.
PlayStation 3 Action11 out of 15
Play the game after a week long break.
Xbox 360 Action3 out of 12
Get a cube
Find your very first cube shard.
PlayStation 3 Action9 out of 105
Apprentice Fortune Hunter
Find 20 treasures