Set the graphics backend to for the best performance.
Open your preferred installation tool (e.g., DBI or Tinfoil) on your console. Mary Skelter 2 ROM NSP UPDATE DLC - Switch Game
Connect your Switch to your PC via USB or insert your SD card into your PC's card reader. Place the NSP files inside a folder named NSPs on the root of your SD card. Set the graphics backend to for the best performance
Select your and DLC NSP files to merge them with the base game. Configure Settings: Mary Skelter 2 ROM NSP UPDATE DLC - Switch Game