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