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