Here is the full list of all 40 XIII achievements.
Find all the documents.
Obtain all achievements.
Find all collectible items.
Find 15 documents.
Complete the campaign on the highest difficulty.
Complete the campaign on easy difficulty.
Stab 15 enemies from behind without being noticed.
Find 10 documents.
Eliminate 20 enemies with improvised weapons.
Empty the Revolver using the alternative fire mode without missing any shots.
Complete a level without being damaged.
Swings from a grappling hookc to another 3 times without touching the floor.
Destory the armor of a fully armored enemy, then kill him with a melee attack.
Eliminate 3 or more enemies with one grenade.
Kill 4 enemies at once with the Bazooka.
Die more than 25 times.
Eliminate 5 enemies in a row with a headshot with the Dragunov.
Eliminate 6 enemies with one magazine of the Revolver.
Destroy a punching bag.
Crash everything at the beach house.
Make it through a level without shooting anyone.
Eliminate 5 enemies in a row without alerting them.
Complete the campaign on medium difficulty.
Complete the Sanctuary cliff section in under 3 minutes.
Find the secret entrance to the Sanctuary.
Find 5 documents.
Escape the Canyons on a jet.
Find your first document.
Have XIII drown.
Eliminate 5 enemies with your fists in a row.
Unlock 15 doors.
Get 20 pieces of armor.
Find a way into Emerald Base.
Eliminate 15 enemies with a headshot in one level.
Find 10 medkits.
Eliminate 10 enemies without getting hurt.
Get full armor.
Kill an enemy with the last bullet of the revolver.
Find your first collectable item.
Reach the truck in Brighton Beach.