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.
Take a royal flight.
Collect the Heimdal rune.
Act against all odds.
Reach the shores of ancient city.
Collect the Odin rune.
Finish one mini-game without skipping.
Begin your journey.
Adopt the baby griffin!
Seek out the Land of Fire.
Seek out the Land of Ice.
Finish a Hidden Object Scene in 90 seconds without any hints.
Finish four Hidden Object Scenes without using a hint.
Finish eight mini-games without skipping.
Complete the Game!
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 the Loki rune.
Collect the Aegir rune.
Collect the Freya rune.
Collect the Thor rune.
Collect all of the golden dragons!
Collect all of the amethyst griffins!
Collect all of the turquoise unicorns!