Fully mod and completely upgrade any weapon.

Complete all optional tombs.

Force an enemy to drop dynamite that kills two people when exploding.

Collect 75% of all relics.

Perform 50 headshot kills in the single player campaign.

Kill 25 unaware enemies.

Kill 35 enemies with the pistol.

Kill 50 enemies with the bow.

Kill and loot 10 small animals (rabbits, chickens, rats).

Perform 15 finishers.

Find 25% of all documents.

Make a comeback when at low health (10% or less)

The player has completed the game without harvesting any Little Sisters