Wikipedia
X-Note
X-Note is an otome game based on Adobe Flash, therefore it can be played on multiple platforms such as Windows, Linux and Mac OS. The game was developed and published by Zeiva Inc and was released on March 8, 2011. The game contains mystery, romance, and supernatural elements. An updated version, X-Note 2.0, was released on March 9, 2012. The game was released on Steam on January 17, 2015.