99 Nights in the Forest is a captivating survival-adventure game that challenges players to explore, craft, and survive in a mysterious woodland. While the main objectives are clear, the game hides numerous secret achievements that can enhance your gameplay experience. If you're looking to 100% the game or simply want to uncover its hidden gems, here are 15 achievements and the methods to unlock them.

1. "Moonlight Forager"

How to Unlock: Collect 50 rare herbs exclusively at night.
Many players miss this because they focus on daytime foraging. Nighttime yields unique plants, so keep an eye out for glowing foliage.

2. "Silent Hunter"

How to Unlock: Take down a deer without alerting any other animals.
Stealth is key. Use a bow and aim for a one-hit kill. Disturbing birds or rabbits nearby will void the achievement.

3. "Master Builder"

How to Unlock: Construct every type of furniture and structure in the game.
This requires extensive resource gathering. If you're short on materials, consider whether to buy 99 Nights in the Forest diamonds to speed up the process, though patience works too.

4. "Echoes of the Past"

How to Unlock: Discover all hidden cave paintings.
Scattered across the map, these paintings reveal lore. Check behind waterfalls and inside unmarked caves.

5. "Fireproof"

How to Unlock: Survive a forest fire without taking damage.
This is tricky but doable if you find a nearby pond or craft fire-resistant gear in advance.

6. "Pacifist Run"

How to Unlock: Complete 10 in-game days without harming any animals.
Focus on fishing and foraging instead. Even defensive actions against wolves will reset the counter.

7. "Treasure Hoarder"

How to Unlock: Collect 10,000 99 Nights in the Forest diamonds in a single save file.
This takes time, but selling rare items and completing quests helps. Alternatively, some players choose to buy 99 Nights in the Forest diamonds to skip the grind.

8. "Ghost Whisperer"

How to Unlock: Encounter and interact with all three spectral NPCs.
These ghosts appear randomly at dusk near landmarks. Listen for whispers and follow the sound.

9. "Untouchable"

How to Unlock: Defeat a bear without taking damage.
Dodging is crucial. Practice timing your rolls and use terrain to your advantage.

10. "Botanist"

How to Unlock: Identify every plant species in the game.
Some plants only spawn in specific seasons, so revisit areas periodically.

11. "Storm Chaser"

How to Unlock: Stand atop the highest peak during a thunderstorm.
Risky but thrilling. Make sure your health is full—lightning strikes are deadly.

12. "Fast Traveler"

How to Unlock: Unlock all fast travel points before Day 50.
This requires efficient exploration. Prioritize unlocking these early to save time.

13. "Lucky Fisher"

How to Unlock: Catch the legendary golden carp.
This rare fish appears in the central lake during rainy weather. Use high-quality bait.

14. "Nocturnal Expert"

How to Unlock: Spend 30 consecutive nights awake without using a bed.
Coffee berries and stimulants are your friends. Avoid caves, as resting resets the count.

15. "The True Ending"

How to Unlock: Unlock the secret ending by fulfilling hidden conditions.
Without spoilers, pay attention to environmental clues and NPC dialogues. This achievement ties into the game’s deepest lore.

Some achievements, like Treasure Hoarder or Master Builder, can be time-consuming. If you're struggling, platforms like U4GM offer guides and resources to help. Whether you grind or buy 99 Nights in the Forest diamonds, the choice depends on your playstyle.