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