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