Hi there! I understand that Overmortal Idle RPG crashes right after you open it the first time and won’t start again after that. Let’s try to get to the bottom of it so you can enjoy your game smoothly.

First, can you tell me a bit more?
- Are you playing on a PC or through a web browser?
- Have you checked for any error messages when it crashes?
- Did this problem start after any update or change to your device or the game?

Meanwhile, here are some general steps that often help with crashes like this on Windows:

1. Restart your device: Sometimes, a fresh start clears temporary glitches that cause crashes.
2. Check for game updates: Make sure you have the latest version of Overmortal Idle RPG installed. Updates often fix bugs causing crashes.
3. Clear game cache or temporary files: If you play through a browser, clearing the cache might help; if you use a dedicated app, look for options to clear cache or temporary data.
4. Lower graphics settings: Some users reported that reducing graphics quality helped avoid crashes if they occur during gameplay. If you can start the game, try lowering graphics settings in options or editing config files if accessible1.
5. Run as Administrator: Right-click the game or browser and select "Run as administrator"—this can solve permission issues.
6. Update your graphics drivers: Outdated or corrupt video drivers on Windows 10 can cause crashes. Check Device Manager or your GPU manufacturer's site for updates.
7. Check your network connection: The game sometimes tries to reach login servers and may crash if it cannot connect properly. Ensure your internet is stable and try restarting your router3.

If none of these steps work, please let me know what you have tried already, and we can dive into more advanced troubleshooting or check for any issues from the developer’s side.

Does this help so far? Would you like me to guide you through any of these steps in detail?