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