461-mortal-k-4-25-u76.u76 Not Found

You can check exactly which files are missing by running a command-line audit. Open your terminal or command prompt in the MAME directory and type: mame -verifyroms mk4 This will list every file MAME expects and highlight which ones, including u76.u76 , are missing. Why u76.u76 Specifically?

Follow these steps in order to resolve the 461-mortal-k-4-25-u76.u76 not found error. Step 1: Verify Integrity of Game Files (Steam/Launcher) 461-mortal-k-4-25-u76.u76 not found