Here is the full list of all 103 Forager achievements. It takes around 60-80 hours to unlock all of the achievements on Windows.
Build 20 structures
Have 100 jelly in your inventory
Have 1,000 items in your inventory
Craft 500 furnace items
Help the Druid
Have one of each gem in your inventory
Catch 50 fish
Own 5 lands
Own 10 lands and 5,000 coins
Mine the giant crystal
Gather royal steel or royal clothing
Have 10 max health
Complete the Ancient Tomb
Complete the Skull Maze
Complete the Crystal Cave
Complete the Fire Temple
Solve the Ancient Galaxy puzzle
Solve the Skull Galaxy puzzle
Solve the Frozen Galaxy puzzle
Solve the Fire Galaxy puzzle
Complete a dungeon without taking damage
Perform a challenging blood ritual
Fail miserably at a trivia minigame
Kill an enemy with a single arrow shot
Kill 3 enemies or more with a single sword slash
Win the jackpot at a slot machine
Kill a magic deer
Kill all giant beets
Win the ice wizard challenge
Use a bottled rainbow
Activate a droid
Have 3 bombs active at once
Dig up an archaeology item
Eat a gem
Die 10 times
Play the game for 3 hours
Kill 100 enemies
Have 100 poop in your inventory
Have 5,000 items in your inventory
Water 100 seeds
Plant 100 seeds
Have 100,000 coins
Have 1,000,000 coins
Craft 2,000 coins
Open 20 big treasure chests
Dig up 50 items
Craft 10,000 items
Build 200 structures
Open a skull chest
Build on top of every water tile
Find 3 secret rooms
Find every secret room
Shoot 100 arrows
Dodge 10 attacks
Dodge a lethal attack
Destroy 100 gravestones
Bottle 100 critters
Talk to every NPC
Complete every NPC quest
Help the Princess
Help the Wizard
Help the Goblin
Help the Fairy Queen
Help the Engineer
Help the Ghost
Help the Old Man
Help the Fox
Complete the museum Foraging bundle
Complete the museum Mining bundle
Complete the museum Building bundle
Complete the museum Farming bundle
Complete the museum Cooking bundle
Complete the museum Alchemy bundle
Complete the museum Trapping bundle
Complete the museum Archaeology bundle
Complete every museum bundle
Learn every skill
Buy every land
Open all big treasure chests
Collect every tool and weapon
Collect every accessory
Collect every seal
Collect every artifact
Achieve every other feat
Reach Void level 5
Reach Void level 10
Reach Void level 20
Reach Void level 30
Light all torches in the Skull Maze
Get a Void gear item
Get a Cosmic gear item
Obtain a sigil
Defeat the Slime King
Defeat the Skeleton King
Defeat the Dark Beet
Make 1 million coins using banks
Upgrade all rods
Have 1,000,000,000 coins
Have 1,000,000,000,000 coins
Defeat the Toxic Guardian
Obtain a Nuclear tier item
Upgrade a structure to use nuclear power
Own 100 nuclear structures at once