[radicalbyte]

I started coding with an Action Replay cartridge. Press a button and you get dumped into a new context where can fully inspect the machine and running program, and can modify any of it.

That's easier it was later on Windows (which for 15 years was how 99% of people used computers) and anything after.

[mrguyorama]

CheatEngine exists on modern systems and can still do a lot of this, though modern game engines are less friendly to the simple "scan for the health variable and set it to 1000" workflow of yesteryear. However, newer versions of cheat engine include C#/monogame decompilers that let you screw around with some unity games

[pipes]

Action reply on a snes? I use to mess around with this too as a ten year old