If you want to dive deeper into this obscure side of retro gaming, let me know:

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Ensure the file you download ends in a .nes extension (or is compressed in a .zip or .7z file containing a .nes file). Never run an executable file (.exe) disguised as a ROM. 3. Running the Game Open your chosen NES emulator. Select "Load ROM" or "Open File" from the menu. Navigate to your downloaded Angry Birds 2 file.

Disclaimer: This article discusses unofficial fan projects and homebrew games. Always support official developers and respect copyright laws.