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