Survive your first night on the peninsula. Build a small fire and a basic shelter after the plane crash, then hold out until morning.
Co-op only. Sleep at the same time as another player in a group sleep so the party rests together.
Co-op only. Revive a downed teammate once — run to a knocked-out player and hold the revive prompt.
Survive five in-game nights. Keep food, water and a defensible shelter going and this unlocks naturally as you play.
Cut down 100 trees with an axe. Chopping wood for building racks this up quickly.
Kill a bunny. Bunnies hop around the forest — hit one with any weapon. Works alone in single player or together in multiplayer.
Eat an enemy. After killing a cannibal, eat part of the body (your survivor can eat limbs). Sanity drops, so use it sparingly.
Multiplayer only. Share a food or drink item with another player.
Kill a bird with an arrow. Craft a bow and arrows, then shoot one of the small birds that land in the forest or on the beach.
Craft and wear the stealth armour, which is made from rabbit hides and other hunted materials — then equip the full set.
Use the compass. Find the compass among the plane wreckage or in luggage, add it to your inventory, and use it.
Sleep on the yacht. Find the wrecked yacht on the coastline and rest there instead of a shelter.
Single player. Kill 100 cannibals over the course of your playthrough — combat-heavy play gets you there.
Set off 20 bombs. Craft bombs from collected electronics and explosives and detonate 20 of them.
Single player. Go more than 10 days in a row without killing any cannibals. Play defensively, avoid combat, and rely on walls and stealth.
Co-op. Revive 10 downed teammates across your co-op sessions.
Hidden achievement — the exact trigger is not confirmed here. See a community guide for the precise conditions before chasing it.
Chop up 50 bodies. Use a weapon on downed enemy corpses to dismember them, 50 times total.
Hidden achievement — trigger not verified here. Check a community guide for the exact requirement.
Finish the game by reaching and completing the ending sequence in the sinkhole / cave system. Story spoiler-light: follow the caves down to the final area.
Collect all cassette tapes scattered through the caves and world. Explore thoroughly — a collectible map from a community guide helps track them down.
Multiplayer only. Share a weapon with another player.
Hidden story achievement — the exact trigger is not confirmed here. It relates to progressing the search for Timmy; follow the story path and see a community guide if it does not pop.
Knock down 6 or more trees with a single explosive. Line up an explosive near a tight cluster of trees. Works in single player or multiplayer.
Hidden achievement — trigger not verified here. Consult a community guide for the exact conditions.
Grow all plant types. Build a garden, plant every seed type you gather (aloe, blueberry and others), and let them all grow.
Eat an entire family — eat a full group of related cannibal enemies. Combat and eating heavy; sanity will drop.
Craft 10 medicine items. Combine aloe and other healing herbs to make herbal medicine ten times.
Repair a shelter. Once a structure takes damage, use logs/sticks to repair it.
Build a very long defensive wall out of log-wall segments. Keep extending a single wall line.
Kill 6 or more fish with one stick of dynamite. Throw dynamite into a school of fish in the ocean or a pond. Single player or multiplayer.
Collect all robot / keycard-related pieces needed for the story. Explore the deep caves; a collectible guide helps locate every piece.
Hidden achievement — trigger not verified here. See a community guide for the exact condition.
Kill a shark. Sharks appear in the ocean; lure or attack one until it dies. Single player or multiplayer.
Kill a downed enemy with a rock. Knock an enemy down, then finish it by throwing or hitting with a rock.
Cut down 1000 trees. A long grind — building and gathering logs over a full playthrough gets you there.
Eat every type of mushroom in the game. Forage the different mushrooms found across the map and caves and eat one of each.
Play through the entire game without killing or eating any animals. Survive on gathered plants and stored food only. Single player or multiplayer.
Craft every item in the game. This includes advanced items requiring rare cave materials — the most demanding achievement; use a full crafting checklist.
Walk 50,000 steps. Accumulates naturally over a long playthrough of exploring on foot.
Explore all caves. The cave network is large and dangerous — bring lighters/torches, weapons and armour, and clear every cave system.
Catch a fish using a fish trap. Build a fish trap at the water edge and wait for a fish to be caught. Single player or multiplayer.
Hidden alternate-ending achievement — the exact trigger is not confirmed here. It is tied to a story choice at the end; see a community guide before committing.
Kill every animal type and mount their heads on trophy mounts. Hunt each species (deer, boar, rabbit, lizard, birds, etc.) and display the heads.
Find all missing passengers — track down the remaining plane passengers as part of the story/exploration.
