If you like this kind of thing, there's also a faithful re-implementation of the original Elite game, with (readable) source code.
Quoting Wikipedia:
"... around 1999 Christian Pinder developed Elite: The New Kind as a modern PC port of the original BBC Micro version. He achieved a faithful port by reverse-engineering the original assembly written BBC Micro version and recreating a platform neutral C code variant from it, but at David Braben's request this version was withdrawn from distribution in 2003. In September 2014, on Elite's 30th birthday, Ian Bell blessed Elite: The New Kind and re-released it for free on his website. Since then, Elite: The New Kind is also distributed again in version 1.1 by Christian Pinder; a source code mirror is hosted on GitHub."
There's a crash bug in the source: when the local star is to be rendered, the game crashes because it tried to explode the star. There are a couple of forks that solve that rather glaring issue, however I don't recall if they're in a playable state themselves.
Quoting Wikipedia:
"... around 1999 Christian Pinder developed Elite: The New Kind as a modern PC port of the original BBC Micro version. He achieved a faithful port by reverse-engineering the original assembly written BBC Micro version and recreating a platform neutral C code variant from it, but at David Braben's request this version was withdrawn from distribution in 2003. In September 2014, on Elite's 30th birthday, Ian Bell blessed Elite: The New Kind and re-released it for free on his website. Since then, Elite: The New Kind is also distributed again in version 1.1 by Christian Pinder; a source code mirror is hosted on GitHub."
Link: https://github.com/fesh0r/newkind