Is it technically possible to write a server for a game that was shut down a few years ago without having a package dump?

Question

reverse engineering

There is a closed online shooter project, the client of which is written in .net.
Is it possible to revive this project; based on the reverse engineering of the client executable file, write the server part from scratch?
I will answer any questions about the client

Answer 1

Well, have you tried looking at the exe through dotPeak or another decompiler? Try to find pieces of code that send something to the network. Find the data that is being sent, see how well the sequence of sending / waiting for packets is visible. If nothing comes out in a week, then you can quit =)
If I were you, I would first contact the developers and ask them to share the server or even the source code of the server. Maybe for some money.

Answer 2

Theoretically, of course it is possible.
But in practice this is almost impossible.
It's easier to make a new game, rewrite the client.