Finish Kovac's first challenge in co-operative mode (local or online).
Kill 500 infected with a critical shot.
Kill 10 infected with a Bomber explosion.
Kill an infected with a charged attack for the first time.
Equip a pet for the first time.
Pick at least one of every type of plant.
Customize your survivor for the first time.
Pick a lock for the first time.
Give an ally an item for the first time.
Finish your first co-operative quest (local or online).
Join a public camp for the first time.
Kill 2 or more enemies at the same time with a melee weapon.
Enter Kovac's bunker for the first time.
Finish Kovac's first challenge while keeping the pylon intact.
Successfully complete half of Kovac's challenges while keeping the pylon intact.
Successfully complete all of Kovac's challenges while keeping the pylon intact.
Reach the maximum level with your character.
Kill 1,000 infected humans.
Kill 10 infected animals of each species.
Kill 50 nocturnal infected.
Successfully complete all of the elite quests.
Kill 5,000 enemies (of all types).
Kill 100 infected with silver bullets.
Kill 100 infected with silex-tipped fletched ammunition.
Kill at least 2 infected with one arrow or crossbow bolt.
Kill 100 infected with traps.
Kill 50 infected during a last stand.
Have all Survival skills at the maximum level.
Have all Weapon skills at the maximum level.
Have all Stamina skills at the maximum level.
Have all Special abilities skills at the maximum level.
Have all In Danger skills at maximum level.
Have the camp at maximum level.
Cook every type of recipe.
Prepare every type of potion.
Make every type of armor.
Make every type of weapon.
Finish 15 co-operative quests (local or online).
Help an ally in trouble 30 times.
Meet every character in the game.
Upgrade a weapon with modules for the first time.
Upgrade 10 weapons with modules.
Finish each of the game's festive quests.
Prepare a first potion.
Finish every quest.
Drink 50 potions.
Wear the Jester's hat for the first time.
Hit a car under alarm with a trash can.
Pick 20 locks.
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