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