Here is the full list of all 24 God Mode achievements.
Finish any map with 6 active Oaths on hardest difficulty
Complete all maps on hardest difficulty
Grind 50 creatures using the Buzzsaw melee attack
Purchase all upgrades
Kill 20 creatures using the Hammer ability
Buy Super Pants
Collect 5 000 000 unspent gold
Complete any map on Platinum difficulty
Reach the final level and attain God Mode
Survive the "Death" Test of Faith
Kill 2500 creatures
Fully upgrade one weapon
Trigger 20 Mage seals
Destroy 50 scarab eggs before they hatch
Enrage 10 Cyclops
Finish any map with 3 or more active Oaths
Complete any map without dying
Purchase your first weapon upgrade
Decapitate 100 Skeletons
Complete your first Oath
Finish any map on any difficulty
Kill 50 enemies using melee
Kill 100 creatures
Kill 25 000 creatures