A new adventure awaits you! Capture enemy territories, summon and upgrade heroes, earn gold and build your own Underworld!

This is a simple idle rpg game in which you have to manage a squad of a wide variety of heroes with unique abilities to defeat monsters in battle, capture and buy new territories to profit from them.

Spend the resources you earn on strengthening your heroes and upgrade already captured territories!

Game Features:

* Unique abilities and heroes
Use a combination of properly selected heroes, where each hero has a unique ability, build tactics and defeat monsters

* Upgrade heroes
Spend the resources you earn on upgrading heroes and upgrading floors to defeat more and more powerful monsters and capture new floors!

* Choose heroes to control floors
Different heroes have unique abilities not only in combat, but also in control the captured floors. Use their powers to reach maximum profit and gold!

* Interesting and strong opponents
Carefully study their abilities to choose the best tactics for the battle! - Choose your abilities wisely for coming battles!

* Exciting adventures
Huge variety of mechanics and events are waiting for you in this adventure!

*Play AFK
You can play even in afk mode by accumulating and collecting resources

*Auto Battle
Choose the position for the heroes wisely, and they will fight in the auto battle mode

*Special Events
Participate in exciting events and get generous rewards!

// Option A // 4x46x

To Idle Underworld mod from happymod.gamefast.org.
You need enable the option "Unknown Sources".
1. Click on the above link to Idle Underworld mod APK.
2. Save the file in your device s folder.
3. Now tap on Install and wait for the installation to finish.
4. Once it is done, open the game and start playing it right away.

// Option B // 1k1543

To Idle Underworld from HappyMod APP, you can follow this:
1. Open your browser and the HappyMod APK file from happymod.gamefast.org - the only official website of HappyMod.
2. Open Android Settings and go into Privacy or Security.
3. Tap the option to Allow Unknown Sources and enable it.
4. Go to your Android s and tap the APK file.
5. Follow the directions on the screen to install it.
6. Search Idle Underworld in HappyMod App.

Why does the app say I have no internet connection? 4i5y53

This issue may occur due to temporary server problems or app glitches. Ensure your device is connected to a stable internet connection.

What should I do if the app is lagging? 593j51

Lagging can be caused by insufficient device resources. Try closing other apps or restarting your device to improve performance.

Why can't I effects? 28681p

ing effects may fail due to network issues or server problems. Check your internet connection and try again later.

How can I fix the network issue while using a VPN? y471i

Sometimes, VPNs can interfere with app connectivity. Try disconnecting the VPN and see if the app works without it.

What can I do if the app keeps crashing? 1y3s2d

If the app crashes frequently, consider clearing the app cache or reinstalling it to resolve potential bugs.

Why can't I access AI modes in the app? 5c6a4j

AI modes may require a stable internet connection. Ensure your connection is strong and try again.

If AI modes are not accessible, it could be due to server issues or your internet connection. Check if other apps are working properly. If they are, the issue might be with the app itself.

Steps to resolve:
1. Check your internet connection by opening a web browser.
2. Restart your device to refresh the network settings.
3. Open the app again and try accessing the AI modes.

What should I do if the app is not ing templates? 508o

If templates are not ing, it may be due to a poor internet connection or server issues. Check your connection and try again later.

Why does the app keep saying 'no internet' even with a connection? r624w

This could be a bug in the app or a temporary server issue. Restarting the app or your device may help resolve this.

Persistent 'no internet' messages can indicate a problem with the app's ability to connect to its servers. Restarting can refresh the app's connection attempt.

Steps to resolve:
1. Close the app completely.
2. Restart your device.
3. Reopen the app and check the connection.

Why does the app crash when importing 4K videos? 391a49

The app may crash due to high resource demands when handling 4K videos. Try using lower resolution files for smoother editing.

4K videos require more processing power and memory. If your device is not equipped to handle such high-resolution files, it may lead to crashes.

What should I do if I keep getting network errors? 693936

Network errors can occur due to unstable internet connections. Try switching to a different network or resetting your router.

Network issues can disrupt the app's functionality. A stable connection is essential for smooth operation, especially when using online features.