Achieve the rating: Silent Assassin
Unlock a technique
Achieve your first accident kill
Continue playing to unlock this secret achievement.
Hide a body
Blend in successfully
Subdue a person
Remain undetected in a whole checkpoint
Gather intel on Raul Menendez from Mullah Rahmaan.
Complete the campaign on any difficulty
Complete Shut It Down
Finish all the Preacher Missions
Use each breaching option at least once
Beat the game on any difficulty.
Make contact with the Ethereal hive mind.
Build the Gollop Chamber.
In a single game, complete every Foundry project.
In a single game, complete every Autopsy.
Successfully assault an Overseer UFO.
Find a soldier with the Gift.
Build the Hyperwave Relay.
Recover the Hyperwave Beacon.
Uncover the alien base's location.
Build a Firestorm.
Build a S.H.I.V.
Kill an alien while flying. Single player only.
Stun an Outsider.
Gain access to the lowest level in your base.
Staff the Engineering Department with 80 engineers
Staff the Research Labs with 80 scientists.
Capture a live alien.
Acquire 1000 credits in one month.
Craft one of Franklin's inventions to decorate your Manor.
Find all pivots and sync the Animus to the Cloud.
Complete each of the epilogue missions unlocked after the credits roll.
Open the Temple Door and learn Desmond's fate.
Complete Sequence 12.
Complete Sequence 11.
Complete Present - Abstergo.
Complete Sequence 10.
Kill 15 guards with a single cannon shot.
Complete Bump in the Night
Finish all the Stump Missions
Complete Old Friends
Complete Hello and Dubai
Complete Connect the Dots
Request ammo from an Ally 25 times in the Campaign
Investigate the jungle facility.
Complete 1 challenge in any level.