Defeat 20 Enemies with Hand-to-Hand Combat

Finish the Game on Easy Without Changing the Difficulty

Kill 20 Enemies by Shooting from the Hip (without aiming)

Kill 30 Enemies with the Desert-5

Kill 20 Enemies with Gunfire While Hanging

Kill 50 Enemies by Melee-Attacking from Behind

Kill 30 Enemies with the Moss-12

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

Kill 50 Enemies with the FAL

Kill 5 Enemies in a Row with Headshots

Defeat 50 Enemies with Hand-to-Hand Combat

Defeat 20 Enemies with Hand-to-Hand Combat

Collect all of the Royal Letters.