VC-20 Diagnostic (Europe) (Program) ROM Download can be obtained free for Commodore VIC20 on EmuGames.net only. Play emulator game in English for the USA region. VC-20 Diagnostic is a Commodore VIC20 ROM that you can download to your computer or play online within your browser. You can also download roms such as Sonic & Knuckles + Sonic The Hedgehog 3 and Pro Evolution Soccer 2 that work on all devices including desktop and mobile. Be sure to rate the game if you enjoyed playing this ROM.