It can be actually pretty subtle since they tend to present themselves as standalone executable games and don't advertise the fact they used pygame, and this wa

It can be actually pretty subtle since they tend to present themselves as standalone executable games and don't advertise the fact they used pygame, and this was the time before unity was much of anything. Nowadays everyone just uses unity. One game I remember was a 2D space game that had pretty good graphics, digging into it's folders and being surprised at seeing pygame and python everywhere. But it's probably been 10 years since I've played it so I can't remember the name. The rest is google.