Some changes will not work correctly when applied to pre-existing saves. Create a shortcut to the game executable with the following launch parameters: +set fs_game RBDOOM-3-BFG-Gameplay-Overhaul +set fs_resourceLoadPriority 0.Move the mod files to /RBDOOM-3-BFG-Gameplay-Overhaul/.Get RBDOOM-3-BFG or Classic-RBDOOM-3-BFG.However, only the titles listed above receive testing. The mod may work with other source ports. Doom 3 with Resurrection of Evil installed.The following version of Doom 3 are supported: Super shotgun and grabber in base campaign.