Hacker News Reader

The Game Genie for the original NES worked like that

https://en.m.wikipedia.org/wiki/Game_Genie

Unlicensed NES Codemasters carts as well like Dizzy and Micro Machines, that used “plug-thru” to utilise the licence chip from any other official game - https://www.nesworld.com/codemasters.php

Reply on news.ycombinator.com