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