"Dog's Heart" is a game that, through the many tasks that one has to deal with many hours of gameplay offers, in a mixture of really tricky places, mini-puzzles and hidden object for relaxation A lot of things you have to look at numerous place together and then add only gradually together, the frame story being but are clearly hints if you have a good memory. It has finally all together, comes the next surprise, as it now at this point continues. Once you have the bulk of through, there is a bonus chapter, where you can loose again spend two or three hours, actually a little extra game for free.