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