Downloading or distributing this ROM exists in a legal gray area, though it is generally considered copyright infringement.

The original creators of Super Angry Birds often post in forums like NESDev or GBAtemp. Search for threads titled "My Angry Birds demake for NES." The authors frequently release "Rev 2" or "Final Build" patches. These are inherently high quality.

For the sharpest graphics, use emulators like Mesen or FCEUX. These emulators allow you to apply filters that smooth out pixels or simulate the scanlines of an old CRT TV, giving you that "High Quality" visual experience.

This is the gray area of emulation. Angry Birds is a trademarked property of Rovio Entertainment. However, because Super Angry Birds is a non-commercial, fan-made demake, no major lawsuits have targeted it directly.

First, a reality check: Rovio never developed a licensed Angry Birds game for the NES. The console was retired long before Red, Chuck, and Bomb became household names. However, the homebrew (indie) gaming community saw the potential for a crossover.

Super Angry Birds is a fan-made demake. It takes the physics-based slingshot mechanics of the mobile hit and translates them into 8-bit sprites, chiptune audio, and classic NES controls.