Here is the full list of all 30 God of Word achievements. It takes around 6-8 hours to unlock all of the achievements on Windows.
Beat All Levels
Reach the Max Level
Defeat Typhon
Defeat the Minotaur
Beat All Typing Levels
Earn 500,000 Gold
Defeat Echidna
Defeat Lycaon
Spell 2,500 Words
Use 10,000 Letters
Defeat Lamia
Defeat Arachne
Save 10 Followers
Defeat the Cyclops
Defeat the Hydra
Unlock 5 Treasure Chests
Defeat the Chimera
Defeat 100 Normal Enemies
Defeat the Manticore
Defeat the Calydonian Boar
Defeat Ladon
Defeat the Nemean Lion
Save a follower with no incorrect guesses
Defeat the Sphinx
Max out an ability
Defeat Cerberus
Kill an enemy with exact damage
Defeat Medusa
Spell a word with 3 or more Special Tiles
Spell a 7 Letter Word