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
Remained sheltered from the reach of Nixi
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
Continued forward no matter the loss
That is all he ever says
Escaped the void and returned to light
Protecting what matters until the end
Spirits were lifted together
Yet a way was found
A fearful and reckless conclusion
Suffered in silence
The price one must pay
Stepped foot on the bridges of Sinnlos