Since there is no official source code available for Super Mario Bros, ... he wrapped the game’s ROM data into py65emu, a Python library emulating the 6502, the CPU that drives the NES.

Compiled code versus source code The vast majority of the packages found on public repositories such as npm for JavaScript, PyPI for Python, and RubyGems for Ruby consist of open-source code files ...

Finding the code itself can be a challenge, although the modding communities of each game is a good place to start. Finding the Jagged Alliance 2 source code took around 30 minutes of searching ...

And while there have been several mods since Team Fortress 2 was launched in 2007, Valve has now released the game's entire source code, which may open the door to a lot of fan creations.

For years we all thought the Fallout source code for the first game and Fallout 2 had been lost, but it now looks like Cain has confirmed that at some point it was found, although this doesn't ...