Kill 20 Enemies with a Single Punch After Weakening Them with Gunfire

Kill 50 Enemies by Melee-Attacking from Behind

Kill 50 Enemies with the FAL

Kill 100 Enemies with Headshots

Kill 30 Enemies with Mk-NDI Grenades

Kill 20 Enemies with Headshots

Defeat 20 Enemies with Hand-to-Hand Combat

Finish the Game on Normal Without Changing the Difficulty

Kill 50 Enemies with the M4

Kill 30 Enemies with the Dragon Sniper

Kill 30 Enemies with Mk-NDI Grenades

Kill 5 Enemies in a Row with Headshots