Mobile gaming has long ceased to be just entertainment for short trips on the subway. Today, users want to customize their gaming experience, change graphics, add new features, or fix bugs that developers have ignored for years. The ability to get under the hood of an application gives you a feeling of complete control over the device, turning a standard smartphone into a powerful portable computer for specific tasks.
However, the process of editing game files on the Android platform is fraught with a number of technical difficulties. Google's security actively prevents unauthorized access to application data, and the structure of game archives is often encrypted or obfuscated. You will need not only an understanding of the file system, but also specialized software, and in some cases, full access to the system via root access.
In this guide, we will look at safe and advanced methods for changing game resources. We will consider working with both open text configurations and binary data files. It is important to understand that any intervention in the application code can lead to its inoperability, so creating backup copies is a mandatory step before starting any manipulations.
Preparation of the environment and necessary tools
Before you start editing, you need to prepare your workplace. Using standard file manager tools built into the shell MIUI or OneUI, you will not be able to access protected directories. You will need a specialized explorer that supports superuser rights. The most popular solution is MT Managerwhich combines the functions of an explorer and an APK editor.
Another important component is access to system folders. Without root access you will be limited to only changing files on the internal memory, which the game rarely accesses. To gain complete control, utilities like Magiskare often used. If your smartphone is not rooted, some changes are possible through emulators on a PC, such as NoxPlayer or LDPlayer, where access to files is open by default.
⚠️ Attention: Obtaining root access will void the warranty for the device and may lead to a failure of banking applications due to the activation of SafetyNet protection.
You will also need a text editor that supports syntax highlighting for the formats XML i JSON. On the device itself it is convenient to use built-in editors in the same MT Manager, but for complex code analysis it is better to connect the smartphone to the computer and use Notepad++ or VS Code.
☑️ Ready for modification
Search and structure of game files
Games on Android store data in several key locations, and understanding their differences are critical. The main body of the application, including executable code and interface resources, is located in the file APK. This file is located along the path /data/app/ or /system/priv-app/ for system games. Changing the contents of the APK requires recompilation and re-signing with a digital signature.
Heavy resources, such as high-resolution textures, 3D models and audio tracks, are usually placed in separate archives of the format OBB. They are located in the folder /Android/obb/ and are named by the package name of the application, for example, com.rockstargames.gtasa. Working with OBB is often easier, since many of them are ordinary ZIP archives that can be unpacked, edited and packed back without violating the integrity of the APK signature.
Configuration files responsible for balance, graphics settings and operation logic are often stored in a folder /data/data/ in a subdirectory shared_prefs or files. Here you will find files in XMLformat that are easy to read by humans. This is where they most often change the amount of in-game currency in offline projects or adjust sensitivity settings.
Use the "Search by name" function in the file manager by entering part of the game name or a keyword (for example, "config") to quickly find the necessary files in the deep directory structure.
Data storage structure may vary depending on the engine, on which the game was created. Projects on Unity often hide assets in files assets.bin, while games on Unreal Engine use specific containers. .pak. To work with them, you will need specialized unpackers, such as UnityEX or UModel.
Editing configuration files and balance
The simplest and safest type of modification is editing text configs. By opening the file prefs.xml or settings.json in a text editor, you will see a clear tag structure. By changing the numeric values between tags, you can significantly affect gameplay. For example, searching for a tag <int name="currency">0</int> and replacing zero with a million will instantly enrich the character in offline mode.
When working with JSON files, it is important to follow strict syntax. An extra comma at the end of a list or a missing closing parenthesis } will cause the game to not be able to read the settings and crash on startup. Always check the validity of the code after making changes. Some games use encodings other than UTF-8, which may result in "crazy text" instead of readable text.
If you want to change the graphics settings, look for files with names like video_config or quality_settings. Here you can force shadows, change the rendering resolution, or remove frame rate (FPS) restrictions that developers have imposed on weaker devices. This allows you to get the most out of your hardware Snapdragon or Exynos.
| File type | Location | Editing complexity | Risk of ban |
|---|---|---|---|
| XML (Preferences) | /data/data/[package]/shared_prefs/ | Low | High (online) |
| JSON Config | /Android/data/[package]/files/ | Average | Average |
| APK (Resources) | /data/app/[package]/ | High | Critical |
| OBB Archive | /Android/obb/[package]/ | Medium | Low |
⚠️ Attention: In online games, changing local balance files (currency, damage) is almost always recorded by the server and leads to instant blocking of the account by the anti-cheat.
APK modification and working with resources
Changing the installation package itself APK is a level for advanced users. This process is called modding and allows you to introduce new features into the game, cut out advertising or change the interface. To do this, the APK file is loaded into a decompiler, which turns the binary code into a readable format, or even After making changes to the code or replacing graphic assets in the folder, the project must be compiled back. The critical point here is classes.dex in a readable format smali or even Java.
After making changes to the code or replacing graphic assets in the folder res, the project needs to be compiled back. The critical point here is application signature. Android will not install or run an APK if its digital signature does not match the original or is not verified with a new key. Tools like MT Manager do this automatically, but a signature conflict with an already installed version of the game will require its complete removal before installing the mod.
Localization is a common task. You can extract string files strings.xml, translate them into Russian and embed them back. This is especially true for indie projects from Asian regions that do not have an official translation. However, be prepared for the fact that the length of the text may not fit into the frames allocated by the interface, requiring additional editing of the layouts.
What is Obfuscation?
Obfuscation is the process of deliberate obfuscation of code by developers. The variables are named a, b, c, and the logic is broken down into many small methods. This is done to protect against hacking and makes editing the APK much more difficult.
Remember that a modified APK can be recognized by the Google Play Protect security system as malware. In this case, you will need to disable scanning or add the file to exceptions, otherwise the system will constantly block the launch of the modified game.
Working with OBB archives and cache
Files OBB (Opaque Binary Blob) are containers for additional data. Unlike APKs, they often don't need to be recompiled. It is enough to unpack the archive (many tools do this on the fly), replace the desired texture or sound file and pack it back, keeping the same folder structure and compression method.
Particular attention should be paid to the compression method. If the original file used an algorithm Deflate with a certain level of compression, and you save it as Store (without compression), the game may not find resources at the offset and give a loading error. Modern file managers usually automatically detect and save compression settings, but a manual check won't hurt.
Often, OBB stores level maps or Lua/Python scripts that are interpreted by the game in real time. Changing such scripts allows you to create your own levels or change the logic of the passage. This is a popular modding method in strategy and sandbox games. You can find such scripts by opening the OBB archive and searching for files with extensions .lua, .py or .txt.
⚠️ Attention: When replacing files inside OBB, make sure that the file name and its extension match exactly up to the case of letters. Android is case sensitive, and the file
Texture.PNGwill not replacetexture.png.
Compatibility issues and rollback of changes
Modification does not always go smoothly. The game may crash immediately upon launch, become stuck on the loading screen, or display graphical artifacts. First of all, check the error logs using adb logcat or the built-in debugging tools. Often the error lies in the syntax of a modified file or in incompatibility between library versions.
If the game stops working, the only solution is to roll back to a clean version. That is why we insisted on creating a backup. Delete the modified files from /data/ and /Android/folders, then reinstall the original APK from a trusted source. Do not try to “fix” a crashed application with repeated edits if you are not 100% sure of the cause of the failure.
Version conflicts are another common problem. After the developer updates your game, all your changes to the APK and OBB may be reset or become incompatible with the new code. You will have to re-apply mods to the new version, which takes time and patience. In some cases, old mods can cause server crashes in online games.
Always save the original files in a separate folder before editing. This is the only guarantee of quickly restoring the system in the event of a fatal error.
Frequently asked questions (FAQ)
Do you need root access to change game files?
To work with system folders /data/data/ and /data/app/ root access is required. However, if the game stores configs in a shared folder /Android/data/ on internal memory, they can be accessed on a regular device with Android 10 and lower. On Android 11+, access to this folder is also limited without special permissions or a PC.
Is it possible to ban an account for changing files?
Yes, this is a high risk. In online games with server-side data verification (PUBG, CoD Mobile, Genshin Impact), any changes to client files are detected by the anti-cheat. The ban can be either temporary or permanent (HWID hardware ban). Modify offline projects only.
How to open a .dex or .bin file?
Files .dex contain bytecode and require decompilation to smali or java using tools like JADX or MT Manager. Files .bin can be anything from textures to encrypted data. You need to analyze the file header (hex dump) to understand its format.
Why does the game crash after replacing an icon or texture?
Most likely, you have violated the file size or compression format. The game engine expects a resource of a certain size in bytes or a specific structure. It is also possible that you forgot to re-sign the APK after making changes to the resources.