Here is the full list of all 20 NyxQuest: Kindred Spirits achievements.
Find all the hidden relics
Find Icarus
Get the power of Ray Casting
Get the Power of Winds
Get the power of Telekinesis
Get all Time Challenge achievements
You have discovered and finished Arcadia
Level 1 finished in less than 4:45
Level 2 finished in less than 3:15
Level 3 finished in less than 8:00
Level 4 finished in less than 7:30
Level 5 finished in less than 4:45
Level 6 finished in less than 5:30
Level 7 finished in less than 5:30
Level 8 finished in less than 6:30
Level 9 finished in less than 9:00
Level 10 finished in less than 6:45
Level 11 finished in less than 5:00
Level 12 finished in less than 8:00
Secret Level finished in less than 8:30