The most immediately impactful differences are all about adjusting Doom 3 to better suit 16:9 HDTVs, and most dramatic of all is an enormous shift in the field of view. We decided to put the original game and the new BFG Edition head to head to get a better idea of the changes id Software has wrought.
But it would be churlish to ignore some of the improvements and refinements made to the overall package. Some might even describe the new release as a downgrade in many respects compared to the 2004 code - a port from current-gen console remixed from the PC original. No advanced graphics settings, no field-of-view adjustments, no out of the box support for mods - on first loading up Doom 3: BFG Edition, it's difficult to avoid the impression that id Software has turned its back on the PC fanbase that supported it for so many years.