Hi there! I see you're encountering the "Unable to reach login server" message when trying to enter Overmortal-Idle RPG on your Linux device. That can definitely block your access to the game. To help you better, could you let me know a bit more?

- Are you connected to the internet without issues otherwise?
- Have you tried restarting your device or router yet?
- Does this happen immediately after launching the game, or after some time during login?
- Are you using any VPN or proxy services?
- Has this problem started recently, or has it been ongoing?

Meanwhile, here are some initial steps you can try:

1. Check Network Connection
Make sure your internet connection is stable. Maybe try loading a website to confirm connectivity.

2. Restart Device & Network Hardware
Sometimes simple restarts clear temporary glitches impacting connections.

3. Disable VPN/Proxy (if any)
These can interfere with the game’s connection to its servers.

4. Check Firewall Settings
On Linux, verify that the firewall (such as UFW or iptables) isn’t blocking the game’s access to the internet.

5. Update the Game Client
Ensure your game is running the latest version, as outdated clients may fail to connect.

If those don’t resolve the issue, it’s worth checking if the game servers themselves are experiencing downtime or technical issues. Overmortal’s official social media or community pages might have announcements on this.

Could you try these and let me know what you find? That’ll help me guide you further!