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