Heavy Rain developer Quantic Dream. The first was Fiv5, which showed up in a domain and European trademark registered by the developer. The second was Infraworld, a project the studio canceled in 2006. It later showed up as a Heavy Rain Easter egg, as well as a Quantic Dream hire's LinkedIn profile. Today, the latter name showed even more signs of life when it surfaced in a U.S. trademark filed by Sony Computer Entertainment Europe this past May.
If Infraworld has indeed been saved from the Quantic Dream cutting room floor, it's possible that it follows the same style of Heavy Rain -- in March, David Cage explained that he wanted to build on his treasured "Interactive Drama" genre. That's still a pretty broad set of expectations, though one thing's for sure: Bizarre and unplaceable accents are pretty much a lock.