How we built a gate-accurate Game Boy emulator in Rust (and got dmg-acid2 pixel-perfect)

We are Zaiq, an engineering studio. We built Revenant, a Game Boy and Game Boy Color emulator, from scratch in Rust, compiled to WebAssembly, with a playable arcade that runs in your browser. No emulation libraries: every chip is written by hand.

Play it right now: https://zaiqltd.github.io/revenant/

Code and the full accuracy scorecard: https://github.com/zaiqltd/revenant

Here is what we built, and what "accurate" actually means.

"It runs Pokemon" is the wrong bar