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