But the game is “finished”. there is no need for alterations.

If only that was the case. But there is no chance a game built for windows 95 could run unaltered on an android phone. Things like the rendering systems, input handling, and sound output will need to be adapted to work on a new platform.

You could, but there isn’t much benefit. The purpose of all that extra information is generally to make the program easier to understand for a human. The computer doesn’t need any of it, that’s why it’s not preserved in compilation. So it is possible to automatically translate assembly to C++, but the resulting program would not be much (if any) easier for a human to understand and work with.

To give a bad analogy, imagine some driving directions: turn left at 9th street, enter the highway at ramp 36, go right when you’re past the burger king, etc. These are translated into physical control inputs by the driver to actually take the car to its destination. Now we could look at the driver’s physical inputs and turn that back into a written list of instructions: turn the wheel left 70 degrees, turn it right 70 degrees, push the gas for 10 seconds, and so on.

All the street name references are now gone. There are no abstracted instructions like “enter the highway” or even “take the second left.” It would be quite difficult for a person to look at these instructions and figure out the trip’s destination. Let alone make some alterations to it because there is roadwork along the way and a detour is needed.

Your thought is correct. The basic problem is that higher level languages contain a lot of additional information that is lost in the compilation process.

Fun quote from an interview with Chris Sawyer:

Latterly the machine code came back to haunt us when the decision was made to re-launch the original game on mobile platforms as RollerCoaster Tycoon Classic a few years ago, and it took several years and a small team of programmers to re-write the entire game in C++. It actually took a lot longer to re-write the game in C++ than it took me to write the original machine code version 20 years earlier.

is-number is a project by John Schlinkert. John has a background in sales and marketing before he became an open source programmer and started creating these types of single function packages. So far he has about 1400 projects. Not all of them are this small, though many are.

He builds a lot of very basic functionality packages. Get the first n values from an array. Sort an array. Set a non-enumerable property on an object. Split a string. Get the length of the longest item in an array. Check if a path ends with some string. It goes on and on.

If you browse through it’s not uncommon to find packages that do nothing but call another package of his. For example, is-valid-path provides a function to check if a windows path contains any invalid characters. The only thing it does is import and call another package, is-invalid-path, and inverses its output.

He has a package called alphabet that only exports an array with all the letters of the alphabet. There’s a package that provides a list of phrases that could mean “yes.” He has a package (ansi-wrap) to wrap text in ANSI color escape codes, then he has separate packages to wrap text in every color name (ansi-red, ansi-cyan, etc).

To me, 1400 projects is just an insane number, and it’s only possible because they are all so trivial. To me, it very much looks like the work of someone who cares a lot about pumping up his numbers and looking impressive. However the JavaScript world also extolled the virtues of these types of micro packages at some point so what do I know.