Here is the full list of all 24 Lake of Voices achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
The dead cannot be revived
The only path
Continued forward no matter the loss
Became true partners
Created a miracle
Found one’s pride
That is all he ever says
Hearts were eased with someone special
Remained sheltered from the reach of Nixi
Escaped the void and returned to light
Persevered through all the hurt
Drowning in every drop
Protecting what matters until the end
Spirits were lifted together
Yet a way was found
A fearful and reckless conclusion
It almost could have been
Suffered in silence
The price one must pay
Stepped foot on the bridges of Sinnlos