Sentinel: Descendants in Time

Sentinel: Descendants in Time is a first-person point and click adventure game with emphasis on exploration and puzzle solving.

You are Beni, seasoned cave explorer and one of the few people to successfully find their way out of the Tristan caverns. A greedy treasure hunter has kidnapped your sister and he will only release you if you enter the tomb of Dormeuse, the most dangerous of all of the tombs.