If you’ve encountered the Kaiju No. 8 The Game Invalid Device Error, you’re not alone. Many players have reported this frustrating issue that prevents them from logging in or playing properly. While the in-game Repair Data option sometimes helps, the most reliable fix is reinstalling the game entirely. This guide explains what the error is, step-by-step solutions, and extra tips to keep your progress safe.
What Is the Invalid Device Error in Kaiju No. 8 The Game?
The Invalid Device Error is a recurring technical problem that blocks players from accessing Kaiju No. 8 The Game. It often appears at launch, locking you out of gameplay despite having a compatible device. The error typically persists even after attempting a quick fix, making it one of the more stubborn issues in the game.
First Step: Try Repair Data
Before doing anything drastic, the first step is to use the built-in Repair Data option in the game menu. This feature checks your installation for corrupted or missing files and attempts to fix them.
However, many players report that while Repair Data runs successfully, the Invalid Device Error continues to show up. If that happens, you’ll need to move to the more effective solution: reinstalling the game.
Best Fix: Reinstall Kaiju No. 8 The Game
The most reliable way to fix the Invalid Device Error is to uninstall and reinstall the game. This replaces all damaged files with the latest version directly from the app store.
How to Uninstall and Reinstall on Android
Open Settings → Apps → Kaiju No. 8 The Game.
Tap Uninstall to remove the game.
Head to the Google Play Store, search for Kaiju No. 8 The Game, and reinstall it.
Log back into your account to continue playing.
How to Uninstall and Reinstall on iOS
Press and hold the Kaiju No. 8 The Game app icon on your home screen.
Select Remove App → Delete App.
Open the App Store, search for the game, and reinstall it.
Sign in again once the game is installed.
In most cases, reinstalling immediately resolves the error and allows you to play without further issues.
Extra Tips After Reinstall
Take Advantage of Reroll
Since reinstalling gives you a fresh start, you can use this opportunity to reroll for better starting characters. This is especially useful if you didn’t get strong units during your first playthrough.
Link Your Account to Save Progress
To avoid losing progress in the future, always link your account after reinstalling. Supported options include Google, Facebook, and Apple ID. Linking ensures your data is safe even if you need to reinstall again.
Why Reinstall Works Better Than Repair
The key difference is that Repair Data only fixes corrupted files, while reinstalling replaces the entire game with a clean, updated version. This eliminates hidden bugs and ensures you’re running the latest build straight from the Play Store or App Store. That’s why reinstalling is far more effective at solving the Invalid Device Error compared to Repair Data alone.
Conclusion
The Kaiju No. 8 The Game Invalid Device Error can be frustrating, but the fix is simple. Start with Repair Data, and if the error persists, uninstall and reinstall the game. Take advantage of the reinstall to reroll for top-tier characters and don’t forget to link your account for future safety. With these steps, you’ll be back to fighting Kaiju without technical interruptions.