When Sony launched the PS3, it promised backward compatibility with the PS2's Emotion Engine, but that feature disappeared a few PS3 SKUs later, much to the dismay of fans. However, now it seems Sony might be bringing back the Emotion Engine, but not through adding hardware, but by emulating it. A recent patent filing reveals that Sony has the code and technology to make it happen, either by decoding and converting, or decoding and recompiling into the PS2's Emotion Engine language.