.RDA File Extension

File created by older versions of R, a statistical analysis and graphing program; saves the statistical objects (functions, values) created by the user at the R prompt while the program is open; used as the older extension for R, which now uses the .RDATA extension.

Game data file used by Anno 2070, a futuristic real-time strategy game; used as a container for game resources and may contain graphics, sounds, maps, or other game object data; also used by Anno 1404, the predecessor to Anno 2070.