It's BYO ROMs, but this $3 NES emulator single-handedly solves Android's gaming problem by letting you play any NES game you can get your hands on.
Bonus: The smug sense of satisfaction that this would never fly in the App Store.
From The App Developers: NESoid is an emulator for the Nintendo Entertainment console. It runs almost all games at full speed in full screen mode with sound.
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