However, C# has certain characteristics—garbage collection and reflection, for example—that require metadata to function correctly. This is where global-metadata.dat comes in. It is a structured file that acts as a comprehensive database, containing all the class names, method signatures, property names, string literals, and attributes that the native binary needs at runtime. The native binary reads and parses this file to reconstruct the original C#-based logic.

This is often the most effective method, as it allows the game itself to decrypt the file into memory, from which you can dump it.

This script hooks into the il2cpp functions that read the metadata, capturing it once decrypted in memory. Method 2: Il2CppDumper

# Decrypt data decrypted_data = cipher.decrypt(encrypted_data)

For game developers, protecting this file is a high priority. If an attacker obtains the libil2cpp.so (or equivalent native binary) and a decrypted global-metadata.dat , they can feed both into a tool like Il2CppDumper . This tool can reconstruct a significant portion of the game's original C# source code ( dump.cs ). With the source code laid bare, malicious actors can easily analyze game mechanics, develop cheats, create hacked clients, and steal proprietary game logic, leading to significant financial losses.