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