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