Delta Force Login Failed ID 35 Error Fix | Login failed ID 4/35

The “Delta Force login failed id 35” error indicates that the game cannot authenticate your login, often due to corrupted files, connectivity issues, or software conflicts. It is sometimes also displayed as “Login failed ID 4/35”.

Here are possible fixes you can try:

🔧 Possible Fixes

1. Delete session / cache files

   • Go to your Delta Force install folder → Launcher\Cache\TSF4G2 (or similar cache directory).

   • Delete everything inside that folder (or the session.txt file if one exists).

   • Launch the game again (it should regenerate fresh session files).

2. Verify integrity / repair game files (Steam)

   • Right‑click the game in your Steam Library → Properties → Installed Files (or similar) → Verify integrity of game files.

   • If verification doesn’t fix it, try reinstalling.

3. Restart Steam / client / PC

   • Fully close Steam (ensure no background Steam processes), reopen it, and then relaunch the game.

   • Also reboot your PC to clear any stuck processes.

4. Check firewall / antivirus / security software

   • Your firewall or antivirus software might be blocking the game’s connection. Temporarily disable them to test.

   • If disabling works, add the Delta Force folder / executables to your antivirus/firewall exceptions.

5. Check account / credentials / password reset

   • Some users said resetting their password fixed similar “ID 35 / ID 4/35” errors.

   • Make sure your login email / Steam account match what Delta Force expects.

6. Ensure no compression or “compress contents” is active on game folder

   • Some users noted that Windows’ “Compress contents to save disk space” on the game folder caused issues for Unreal Engine games. Disable that if active.

7. Wait for server / backend issues

   • It’s possible the error is caused by server outages or backend instability. Some users say the error resolves after some time.

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Other network troubleshooting

If the above steps don’t work, consider these general network fixes:

• Restart your router: Turn your router off, wait 30 seconds, then turn it back on.
• Log in from a different network: If possible, try connecting from a different network to rule out a local network issue.

Check for server maintenance

If many people are reporting the same issue, the problem may be on the game’s end. Delta Force servers could be undergoing maintenance.

• Check the official Delta Force or Level Infinite social media accounts for announcements.
• If a server issue is confirmed, your only option is to wait for the maintenance to complete.