If you prefer a more reliable (and safer) way to play, consider playing via a 3DS emulator. It requires more setup, but you'll get the intended experience:
Use a trusted antivirus app to scan any downloaded file before installing it. Alternative Attack on Titan Games for Android Attack On Titan Humanity In Chains Download Apk For Android
An emulator is useless without the game software. You will need to obtain a "decrypted" ROM of Attack on Titan: Humanity in Chains . The file format is typically .3ds or .cia . If you prefer a more reliable (and safer)
At least 2GB of free space for the game file and shader caches. Tips for Optimal Performance You will need to obtain a "decrypted" ROM
Grant the app permissions to access your device storage when prompted.
I'll cite sources where appropriate. For example, the Dotesports article for game ranking and features, the Gamespot review for critical reception, the JeuxMangas page for ROM information, the TapTap posts for compatibility issues, the Citra emulator information, the safe APK download tips, and the fan game APK results.