Because you will do a lot of mistakes because you can't know the different details.

start MySQL database, run the emulator, launch game client.

copy-paste your game-client files and exe to kRO game client.

Configure server-side (emulator), set proper settings, and so on to make it work.

Compile the server (from sources to a binary file (what you can run on your OS)).

Build a GRF with all required for exe resources and files.

Take from somewhere exe file, apply correct patches to your exe.

configure mechanic, turn off some SRC functionality and so on.

download and install Visual Studio Community 2019 with all packages (size ~10GB).

set correct permissions for database users what will used via emulator for working with DB.

To make an RO offline server usually you need: Just scroll down and download the whole package folder, and while its downloading, watch video above, and you will understand how easy everything are.

Everything else explained in the video and below, and in readme.txt. Tl tr: here is everything what you need if you are a newbie and want to run the own server in less than 5 minutes on your Windows PC.

For android instal Thor: Ragnarok