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
Yet a way was found
The only path
Continued forward no matter the loss
Became true partners
Created a miracle
That is all he ever says
Drowning in every drop
Persevered through all the hurt
Spirits were lifted together
A fearful and reckless conclusion
Escaped the void and returned to light
Found one’s pride
Hearts were eased with someone special
Protecting what matters until the end
It almost could have been
Suffered in silence
The price one must pay
Stepped foot on the bridges of Sinnlos
Remained sheltered from the reach of Nixi