Here is the full list of all 11 Soulless: Ray Of Hope achievements.
Complete the game in one sitting.
See the world crumble before you.
Jump into the flames, and end your journey.
Free all of the hope pieces in one session.
Acquire a flashy set of wings.
???
Collect all of the notes.
Stay pure, and reach your friend.
Find all secret rooms.
Witness all of the endings.
Complete the game without dying.