Here is the full list of all 50 Loop Hero achievements. It takes around 40-50 hours to unlock all of the achievements on Windows.
Defeat Omega 6 times
Unlock all the encyclopedia
Die and resurrect 3 times in one expedition
Synthesize 100 resources
Get all the camp items
Craft 25 items
Place 10 cards you didn't have in your deck, not counting ^Oblivion^
Defeat the boss in the first expedition
Defeat the hunter 3 times
Get 10 orange items in exchange for the trophies in camp
Fill the whole map
Die outside of battle
Synthesize 5 resource with alchemy
Defeat the Priestess 3 times
Transmute 50 resources into hydrogen
Kill each enemy
See all the possible tiles
Transmute 5 resources into hydrogen
Defeat Omega
Build all the possible camp structures
Find all possible types of resources
Have 10 living skeletons in one battle
Defeat the Hunter
Embark on your fiftieth expedition
Craft 5 items
Defeat the Lich 3 times
Read 50 different dialogues
Unlock 50 chapters in the encyclopedia
Dismantle 10 items
Dismantle 5 items
Dismantle a camp structure
Defeat the Priestess
Build the river
Unlock a chapter in the encyclopedia
Get 5 camp items
Unlock the ^Necromancer^ class
Complete 100 loops
Place 1000 cards
Lose 100 resources
Die ten times
Drink 50 potions
Kill 1000 enemies
Find 100 resources
Embark on your tenth expedition
Unlock the ^Rogue^ class
Defeat the Lich
Die first time
Build the first camp structure
Kill 5 enemies
Embark on your first expedition