Hidden in Time: Mirror Mirror is a hidden object game that was first released in 2009. It is one of the games in the Hidden in Time series of hidden object games. In the game, the player assumes the role of one of the descendants of the owner of Castle Fairwich. However, the castle is going to be sold in a bit over a week and the player must solve the ancestral mystery hidden behind the magic mirror before time runs out.
The game features 27 locations that are spread throughout nine levels. When the player visits a location, there are several items that need to be found. Players will have to visit each location twice. On the first visit, players must find a list of items and on the second visit, players must uncover a secret object. The game also has a hint system that can be used when players are stuck looking for an item. Hints are located at the lower right side of the window. Aside from the hidden object game, there are also three kinds of mini-games between levels. These include repairing images, spotting the difference between two pictures, and reflecting mirrors. The game is also timed, so players must find all of the objects before time runs out.