Here is the full list of all 12 Red Goddess: Inner World achievements.
Destroy 15 enemies using Rage's special melee attack.
Destroy 15 enemies using Fear's special melee attack.
Overcome your demons.
Complete Act IV.
Destroy 30 enemies using possession ability.
Complete Act III.
Complete Act II.
Collect 500 gold.
Collect 300 gold.
Complete Act I.
Perform 100 combos.
Perform 60 combos.