Most successful project... What is success?

My first computer at 8 years old was a Commodore64. There was no internet yet, so I used the manual to learn about BASIC and assembly, sound and sprite registers, and created a pretty elaborate RPG. Mostly text, some sprite art, soldered some eeprom cartridges, optimized the code. Spent almost a year on it. An enthousiast magazine picked up on it, revised, QA'ed & published the game, sold a little over 10k samples. I got ƒ0.25 per sale, and I was completely overwhelmed how much candy one could buy for ƒ2500 ($2k corrected for inflation).

More recent:
I was employee #3 at my current company, started when it was worth nothing and the website redirected to a set of Google Forms containing all the logic. I wrote a large part of the first, monolithic backend.

Now there's teams in a dozen countries, and an estimated revenue of a quarter billion.

So obviously my current "project" is more successful.

Still, my current job sucks, the company turned into a desolate passion-free wasteland full of soulless fake hipster zombies and managers who seem to derive sexual pleasure from holding extremely ineffective meetings, endlessly rubbing their calendars together in their bureaucratic orgy of ineptitude.

So, I'm more proud of my C64 game.