Here is the full list of all 7 Remnants Of Isolation achievements.
Keep the promise to Celesta.
Through the sacrifice of your partner, you can finally walk free.
Seal away the castle at the cost of eternal loneliness.
Hone your powers to unmatched levels.
Command the power of all elements.
Leave the castle hand in hand under 1:30 hours.
Uncover all traces of humanity that once walked these nightmarish halls.