Written by Dave Gilbert, the games follow the story of medium-against-her-will Rosa Blackwell and her ghost parter Joey Mallone, bringing peace to the restless souls of recently deceased New Yorkers.
While I am still waiting for the DVD package I ordered, containing all four games of the series, I got to download the two latest ones: The Blackwell Convergence as well as aforementioned Blackwell Deception.
The games, running at a decidedly oldschool 640x480, also feature a great, jazzy soundtrack. Listen for example to Rosa's Theme from the Blackwell Deception:
Unfortunately, the team at Wadjet Eye decided to use the AGS Engine, a freeware adventure game engine that only runs on Microsoft Windows. I managed to get them working using VMWare Fusion, but the experience is shaky to say the least.
Still, this is a well written series of adventure games and I urge you to check it out.