The Other Darrin: Before the release of Convergence, Rosa was voiced by Sande Chen in Legacy. She's replaced by Rebecca Whittaker from Convergence onwards, and all of Rosa's lines in Legacy were redubbed for the re-release, which is currently the most widespread version.
Dave Gilbert's plan for the series originally involved ten installments in the series. Some of the planned storylines of the games was later dropped or merged when the final number of installments landed on five.
Unbound and Convergence were originally planned to be one single game, but development was taking too long so the project was split.