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