A free app for Android, by Artifex Mundi.

The Shadow of Karkhala is a hidden object adventure game where you will have to unravel a mystery. In this story, the demonic preacher has escaped into remotest mountains of Karkhala. He’s looking for a secret that could give him power, so he can use it to dominate the world. The only thing that is even more mysterious is why he is looking for a secret. 

After finding an ancient monastery high on the mountain, you’ll discover that it is not an abandoned building but a secret headquarters. There are 43 hand-drawn locations and each one of them holds a mystery.