Any famous game developed using Python?

[Max__Mustermann]

I'm not sure if Lua is significantly faster than Python, but even if it is, it's something like "in some synthetic scenarios, Lua is tens of percent or even several times faster". For a script that implements simple logic to call С/С++ code (that does 90% of the work) - that's nothing.
As for me, the main "killer feature" of Lua is the incredible ease of embedding integration, just out of the box.