The Fallout 3 Savegame format (*.fos), shows some similarities with the Oblivion format. Discoveries about the FO3 format will be posted on this page. In addition, the Xbox 360 file format for the Fallout 3 Savegame format (*.fxs) closely resembles the PC format from offset 0000D000 on, however currently the two are not interchangeable like it was for Oblivion. Most of the information found here is derived/abstracted from this page.