: In the settings, ensure all players have selected the same server region (e.g., EU, US, Asia) to minimize latency.

: Ensure your Windows Firewall is not blocking the game; you may need to add an exception for ZeroHour.exe . 3. Stability ("Proper Piece") Tips

: Use Radmin VPN or Hamachi . Radmin is often preferred for gaming because it doesn't require a login and has dedicated gaming networks.

: Use the Steam Overlay (Shift + Tab) to right-click a friend's name and select Join Game , or look for their lobby in the server browser. 2. Playing via LAN or Virtual LAN (Hamachi/Radmin VPN)

If you are trying to play a "proper piece" (stable version) over a local network or virtual LAN:

: Every player must have the exact same version of the game. Check the main menu for the version number.