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
It almost could have been
Drowning in every drop
Persevered through all the hurt
Found one’s pride
Hearts were eased with someone special
Escaped the void and returned to light
That is all he ever says
Suffered in silence
Protecting what matters until the end
Spirits were lifted together
Remained sheltered from the reach of Nixi
Yet a way was found
A fearful and reckless conclusion
The price one must pay
Stepped foot on the bridges of Sinnlos