Here is the full list of all 35 One Step From Eden achievements.
Have at least 16 broken tiles at the same time
Cover the entire field in flames
Beat the game without collecting any Artifacts
Beat the game without taking any spells
Beat Serif and get sent back
Execute Serif
Kill a hostage with the Devour spell
Win a boss fight with 1 HP
Have over 200 cardtridges in your deck
Execute Terrable
Have 1 Spell in your deck
Beat the game with every character
Spare Terrable
Defeat tier 4 Shopkeeper
Defeat tier 4 Selicy
Defeat tier 4 Reva
Reach the Gate
Defeat tier 4 Violette
Defeat tier 4 Saffron
Kill the last enemy with the Fadeaway spell
Defeat tier 4 Shiso
Defeat tier 4 Hazel
Upgrade the same spell 4 times
Get a Calamity spell
Have 8 pacts at the same time
Have 0 Max Mana
Have over 9,999 Shield
Win a battle without using a Spell or Weapon
Destroy a Self Defense hazard
Defeat tier 4 Terra
Defeat tier 4 Gunner
Have a spell from every Focus in your deck
Cast 10 Jams in one battle
Kill Gunner or Shiso with a Slashfik spell
Beat Hell Mode 14