Here is the full list of all 26 The Secret Order 3: Ancient Times achievements. It takes around 4-5 hours to unlock all of the achievements on Windows.
Complete the Game!
Collect the Thor rune.
Collect the Aegir rune.
Collect all of the turquoise unicorns!
Collect the Freya rune.
Seek out the Land of Ice.
Seek out the Land of Fire.
Collect the Loki rune.
Take a royal flight.
Collect the Heimdal rune.
Act against all odds.
Reach the shores of ancient city.
Collect the Odin rune.
Finish four Hidden Object Scenes without using a hint.
Finish eight mini-games without skipping.
Finish a Hidden Object Scene in 90 seconds without any hints.
Begin your journey.
Adopt the baby griffin!
Finish one mini-game without skipping.
Help the innocent in need.
Gain support from the elves.
Gain support from the fairies.
Gain support from the dwarves.
Bring back peace to Forest of Hope.
Collect all of the golden dragons!
Collect all of the amethyst griffins!