[Koshcheiushko]

This is really good resource for someone, who wants to learn assembly.

Can somebody please share this good or closer documented source code in other languages such as C++, C or any other.

[MarkMoxon]

The original Elite was reverse-engineered into C by Christian Pinder as part of the Elite: The New Kind project. The source is out there. It's a brilliant bit of work.

You can use a search engine to find it.

[WillAdams]

That would be the domain of "Literate Programming":

http://literateprogramming.com/

esp. see:

http://literateprogramming.com/adventure.pdf