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If the game crashes before booting, go to your Documents folder (e.g., Documents\Rockstar Games\Red Dead Redemption 2\Settings ). Open the system.xml file using Notepad. Locate kSettingAPI_Vulkan and change it to kSettingAPI_DX12 . Save and close the file. 2. Delete Corrupted Cache (SGA Files) errgfxd3dshader1 best