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