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