The 2.0 version of Nightfall Mysteries - Black Heart CE for Mac was available to download on the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software. This Mac app was originally developed by Big Fish Games. The software relates to Games.
From the developer:
Stop the evil Vansig family before they point their vengeful wrath at your friend Christine in Nightfall Mysteries: Black Heart! Just as Viggo and Christine believed themselves free from the shackles of the Vansig family, an enemy they thought dead returns to kidnap Viggo, destroying the newfound peace of the lovers. Powerless to save Viggo by herself, Christine has called upon your help in Nightfall Mysteries: Black Heart!
You may want to check out more software for Mac, such as Nightfall Mysteries - Haunted by the Past CE, Nightfall Mysteries - Asylum Conspiracy or Nightfall Mysteries: Haunted by the Past, which might be similar to Nightfall Mysteries - Black Heart CE.