A .rar file is a compressed archive. You will need a utility like WinRAR or 7-Zip to extract the game files before you can play. The Mirror Mysteries Walkthrough - Big Fish Games
If your file refers to a different game in the series, you might be looking for: Mirror.Mysteries.rar
The core objective is to repair a main mirror to rescue children trapped inside by exploring seven different "mirror worlds" to collect shards. A darker, horror-themed adventure game by Haiku Games
A darker, horror-themed adventure game by Haiku Games involving a boy named Julian and a "Mirror Man". Video walkthroughs for all chapters are available on YouTube . You can find player-created tips on the Steam
The sequel involves a detective (the player) helping Charlotte find her brother Tommy in Berkshire Manor. You can find player-created tips on the Steam Community Guides page.