Cold Darkness Challenge: Collect all 8 documents

Perform 25 special stealth kills with the knife

Cold Darkness Challenge: Kill 75 enemies in a single Cold Darkness run

Endurance Challenge: Survive for 7 days

Endurance Challenge: Eat the meat of 5 wolves that were killed with poison damage

Endurance Challenge: Eat the meat of 5 birds, squirrels or rabbits that were killed with fire

Endurance Challenge: Destroy 3 ceiling spike traps after being caught in them

Endurance Challenge: Escape the forest after surviving 10 days, with at least 10 Relics

Endurance Challenge: Survive for 5 days

Kill 20 enemies using explosive environment objects (Singleplayer)

Get into the prison without raising alarm in 'First Victory' mission

Lure 5 enemies by throwing stones