The Deadly Device was released in October 23, 2012 and is the 27th Adventure/Mystery game in the Nancy Drew PC games.
When an expert scientist is killed by an electric device called a Tesla Coil, Nancy Drew is put on to the task of putting the murderer behind bars. Exploring a dangerous laboratory, she finds herself highly unwanted and needs to arrest the culprit before the Tesla Coil reactivates.
- Ellie York: Ellie York works the night shift in the research department. She is a little evasive and does not get along well with Mason, which drove her to work opposite shifts. While appearing genuinely shaken, her actions after Niko's death seem to indicate that she could be hiding something.
- Gray Cortright: Gray Cortright is the head of security and knows the security system well. Not the friendly type, he comes across as a little intimidating and is not forthcoming while being questioned. His knowledge and unrestricted access to all areas provide plenty of opportunity for sneaking around unnoticed.
- Mason Quinto: Mason Quinto is the smart, driven and arrogant senior lab assistant. He likes structure and perfection, and values his work. Unlike Niko, Mason believes in proprietary rights. How far will he go to get the credit for his work that he thinks he deserves?
- Ryan Kilpatrick: Ryan Kilpatrick is the tech geek girl and has built and modified several parts of the lab. Her knowledge of the Tesla coil makes her a prime suspect. Is her nice girl impression genuine or an act?
- Victor Lossett: Victor Lossett is the co-owner of the lab and has hired you to solve the cold case murder. Eager for the case to be solved, he pushes Nancy to find the culprit. Niko's work and name appear to be very important to him, but there could be more to this mystery than meets the eye.
- Deirdre Shannon: Deirdre Shannon returns as a phone friend to assist Nancy in her investigation. Though the girls grew up together, she's never really been a fan of Nancy's, but helping her out could mean a better grade in her criminology class back in the girls' hometown of River Heights.
- Frank and Joe Hardy: Frank and Joe Hardy are available by phone to once again assist Nancy in her investigation. As big fans of Nikola Tesla, they are eager to hear about the case and to help in any way they can.
- Niko Jovic: Rumor in the scientific community was that leading physicist Niko Jovic had discovered the secret to wireless energy transfer. But before he could release his findings to the world, he was found murdered. Like Tesla, Niko was clever yet secretive. Could someone be looking for what he left behind?