Here is the full list of all 18 The Nature achievements.
Gather 10 apples.
Kill the Spirit of the nature.
Dodge from 10 projectile.
Collect 10 meats.
Craft the sword of the nature.
Drink a dream liquid.
Reach level 30.
Reach level 50.
Reach level 99.
Gather 8 type of items.
Dodge from 30 projectile.
Kill 10 livings.
Kill 20 livings.
Kill 50 livings.