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