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