Defeat 250 Enemies with Headshots

Kill 50 Enemies with the Micro-9mm

Kill 50 Enemies with the M4

Kill 50 Enemies by Melee-Attacking from Behind

Kill 20 Enemies with Gunfire While Hanging

Kill 100 Enemies with Headshots

Kill 50 Enemies with the FAL

Find the Strange Relic

Kill 5 Enemies in a Row with Headshots

Beat the Last Chapter Without Dying on Normal Difficulty or Harder

Activate a Tweak

Find all Treasures and the Strange Relic

Defeat 5 Descendants With a Sniper Rifle