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