Nintendo NES Game Genie

Plugged it in and my kid was immediately flying through levels with infinite lives. The pins are a little worn, but it reads every code I've tried just fine.

I was amazed at how easily it let me add infinite lives to Mega Man 2, and the codes printed on the top are super convenient. The connector pins are still tight and responsive after all these years.

The code slot fit snugly over my cartridges and the menu popped up instantly, no fiddling needed. It's brought a whole new life to games I’d already beaten, letting me mess with infinite lives and weird level skips that feel completely fresh.