Here is the full list of all 49 How to Survive 2 achievements.
Have the camp at maximum level.
Finish each of the game's festive quests.
Make every type of weapon.
Drink 50 potions.
Have all "Weapon" skills at the maximum level.
Make every type of armor.
Cook every type of recipe.
Have all "Stamina" skills at the maximum level.
Have all "Special abilities" skills at the maximum level.
Have all "In Danger" skills at maximum level.
Prepare every type of potion.
Have all "Survival" skills at the maximum level.
Finish every quest.
Successfully complete all of the elite quests.
Kill 100 infected with silver bullets.
Reach the maximum level with your character.
Successfully complete all of Kovac's challenges while keeping the pylon intact.
Kill 10 infected animals of each species.
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 100 infected with traps.
Help an ally in trouble 30 times.
Kill 50 nocturnal infected.
Prepare a first potion.
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.
Wear the Jester's hat for the first time.
Equip a pet for the first time.
Kill 500 infected with a critical shot.
Pick 20 locks.
Kill 10 infected with a Bomber explosion.
Upgrade a weapon with modules for the first time.
Pick at least one of every type of plant.
Kill at least 2 infected with one arrow or crossbow bolt.
Finish 15 co-operative quests (local or online).
Finish Kovac's first challenge while keeping the pylon intact.
Finish Kovac's first challenge in co-operative mode (local or online).
Kill 2 or more enemies at the same time with a melee weapon.
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.