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