Here is the full list of all 49 How to Survive 2 achievements.
Kill 100 infected with silver bullets.
Make every type of armor.
Wear the Jester's hat for the first time.
Meet every character in the game.
Cook every type of recipe.
Prepare every type of potion.
Kill 5,000 enemies (of all types).
Upgrade 10 weapons with modules.
Drink 50 potions.
Kill 100 infected with flint-tipped fletched ammunition.
Equip a pet for the first time.
Kill 50 nocturnal infected.
Hit a car under alarm with a trash can.
Have all "In Danger" skills at maximum level.
Have all "Special abilities" skills at the maximum level.
Have all "Weapon" skills at the maximum level.
Have all "Stamina" skills at the maximum level.
Have all "Survival" skills at the maximum level.
Successfully complete half of Kovac's challenges while keeping the pylon intact.
Prepare a first potion.
Kill 2 or more enemies at the same time with a melee weapon.
Join a public camp for the first time.
Kill 1,000 infected humans.
Kill an infected with a charged attack for the first time.
Finish Kovac's first challenge while keeping the pylon intact.
Finish Kovac's first challenge in co-operative mode (local or online).
Pick 20 locks.
Finish 15 co-operative quests (local or online).
Kill 10 infected with a Bomber explosion.
Upgrade a weapon with modules for the first time.
Kill 500 infected with a critical shot.
Kill at least 2 infected with one arrow or crossbow bolt.
Help an ally in trouble 30 times.
Pick at least one of every type of plant.
Pick a lock for the first time.
Customize your survivor for the first time.
Enter Kovac's bunker for the first time.
Finish your first co-operative quest (local or online).
Give an ally an item for the first time.
Successfully complete all of Kovac's challenges while keeping the pylon intact.
Reach the maximum level with your character.
Kill 10 infected animals of each species.
Successfully complete all of the elite quests.
Kill 100 infected with traps.
Kill 50 infected during a last stand.
Have the camp at maximum level.
Make every type of weapon.
Finish each of the game's festive quests.
Finish every quest.