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