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