Here is the full list of all 25 Zorya Playtest achievements.
Complete the final level
Complete the last level with the Goddess Skin
Complete all levels as Aysu
Complete all levels as Solveig
Complete all levels as Aysu and Solveig
Find a Forgotten Prayer and complete the level
Find all Forgotten Prayers
Complete the Crow constellation
Complete the Aries constellation
Complete the Pisces constellation
Complete the Spear constellation
Complete the Butterfly constellation
Complete a level in local co-op
Complete a level in online co-op
Complete a level without burning any Aries
Using the communication wheel, place a flag once.
As Aysu, push an Aries off the level
Talk with Huginn and Muninn 7 times
Complete the Mink constellation
Complete the Whale constellation
Complete the Frog constellation
Finish the level Mink I under 90 seconds
Never backtrack the time