Here is the full list of all 19 Candleman: The Complete Journey achievements.
Complete a level after failing 5 times.
Light all candles in a level.
Light a candle.
Run out of wax.
Little Candle discovered although his flame is weak, it can still guide the way in darkness.
Little Candle discovered his flame can bring warmth.
Little Candle discovered his flame can ignite others.
Complete Chapters 1, 2 and 3.
Complete Chapters 4, 5 and 6.
Complete Chapters 7, 8 and 9.
Complete Chapters 10, 11 and 12.
Light all candles in Chapters 1, 2 and 3.
Light all candles in Chapters 4, 5 and 6.
Light all candles in Chapters 7, 8 and 9.
Light all candles in Chapters 10, 11 and 12.
Complete all time challenges in chapters 1, 2, 3.
Complete all time challenges in chapters 4, 5, 6.
Complete all time challenges in chapters 7, 8, 9.
Complete all time challenges in chapters 10, 11, 12.