The public-domain game Bio Worm is included. Other ROMs must be supplied by the user. A number of public domain games/demos are available at www.pdroms.de. Transfer games anywhere to your internal storage/SD card and browse to them from within the app (default SD card directory on most devices is /mnt/sdcard). ROMs may be in .smc and .sfc formats, optionally in .zip files.
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Visit the homepage at explusalpha.com for more info & apps, ports for other platforms, and source code.