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