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