While there isn't a tight continuity between 5pb. and Nitroplus' science adventure games, they do take place in the same fictional setting with some cross-overs. FES from Chaos;Head had a presence in Steins;Gate, and a minor character from Steins;Gate will have a larger role in the upcoming Robotics;Notes.
Nae Tennoji, the young daughter of Steins;Gate's Mr. CRT, as she appears in Robotics;Notes.
Robotics;Notes follows a fighting game enthusiast inspired to create a robot based on his favorite game. The visual novel is scheduled for a June 28 release on the PS3 and Xbox 360.