Arevoatl: Seven Coins

Arevoatl Seven Coins is a first-person puzzle/hidden object game that takes place in an old estate. You receive a cryptic letter from your grandfather, when you come to him, you do not find him at home. Carefully study the letter and follow its clues. You need to collect objects and solve quests, passing room by room. Only the most attentive will be able to figure out where Professor David Patersan has disappeared to.

There're 20 to 60 items hidden at a location, you have to find them all in order to proceed to the next location. Some items are visible, some are hidden, use your wit to find it. There's no time constraints, collect items, listen to the music and enjoy the cool visuals.