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 200 structures
Bottle 100 critters
Use a bottled rainbow
Complete the museum Building bundle
Perform a challenging blood ritual
Kill 3 enemies or more with a single sword slash
Collect every artifact
Help the Ghost
Talk to every NPC
Complete the museum Farming bundle
Complete the museum Mining bundle
Complete the museum Foraging bundle
Have 100,000 coins
Complete the museum Alchemy bundle
Buy every land
Water 100 seeds
Plant 100 seeds
Complete the Crystal Cave
Find 3 secret rooms
Solve the Ancient Galaxy puzzle
Solve the Skull Galaxy puzzle
Solve the Frozen Galaxy puzzle
Mine the giant crystal
Solve the Fire Galaxy puzzle
Complete the Fire Temple
Complete the Ancient Tomb
Kill a magic deer
Help the Wizard
Open 20 big treasure chests
Help the Engineer
Help the Princess
Shoot 100 arrows
Help the Goblin
Have 10 max health
Complete the Skull Maze
Open a skull chest
Craft 10,000 items
Own 10 lands and 5,000 coins
Complete the museum Trapping bundle
Kill an enemy with a single arrow shot
Help the Fox
Help the Old Man
Have 100 poop in your inventory
Win the ice wizard challenge
Activate a droid
Destroy 100 gravestones
Craft 2,000 coins
Fail miserably at a trivia minigame
Die 10 times
Have 5,000 items in your inventory
Gather royal steel or royal clothing
Dodge a lethal attack
Dodge 10 attacks
Play the game for 3 hours
Build 20 structures
Help the Fairy Queen
Help the Druid
Craft 500 furnace items
Dig up 50 items
Dig up an archaeology item
Kill 100 enemies
Own 5 lands
Have one of each gem in your inventory
Have 1,000 items in your inventory
Have 100 jelly in your inventory
Catch 50 fish
Complete a dungeon without taking damage
Win the jackpot at a slot machine
Kill all giant beets
Have 3 bombs active at once
Eat a gem
Have 1,000,000 coins
Build on top of every water tile
Find every secret room
Complete every NPC quest
Complete the museum Cooking bundle
Complete the museum Archaeology bundle
Complete every museum bundle
Learn every skill
Open all big treasure chests
Collect every tool and weapon
Collect every accessory
Collect every seal
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