
If the game does not have a .dll file, you need to extract the data first. You can use a web dumper like Il2CppDumper: il2cppdumper.com, You will need to upload two specific files from the game into the website:File 1 (libil2cpp.so): Found in the lib folder.File 2 (global-metadata.dat): Found in assets > bin > data > managed > metadata. The website will unpack them into a collection of files. Take the newly created Assembly-CSharp.dll file and open it in dnSpy to read it.