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.
Reach the Max Level
Beat All Levels
Defeat Typhon
Beat All Typing Levels
Defeat Echidna
Defeat the Minotaur
Earn 500,000 Gold
Defeat Lamia
Defeat Lycaon
Save a follower with no incorrect guesses
Save 10 Followers
Defeat Arachne
Defeat the Cyclops
Spell 2,500 Words
Use 10,000 Letters
Defeat the Hydra
Defeat 100 Normal Enemies
Kill an enemy with exact damage
Defeat the Chimera
Unlock 5 Treasure Chests
Defeat the Manticore
Defeat Ladon
Defeat the Calydonian Boar
Defeat the Nemean Lion
Defeat the Sphinx
Max out an ability
Defeat Cerberus
Defeat Medusa
Spell a word with 3 or more Special Tiles
Spell a 7 Letter Word