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