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