. Because pirated versions cannot access the Steam Workshop or the global server list, you must manually configure both the host and the client. Method 1: The "-nosteam" Direct Connection

: You can typically invite friends directly through the Steam overlay or accept an invitation sent by a friend running the same fix. Important Notes

is possible primarily by bypassing Steam’s networking and using Direct IP connections Online Fix

Since Steam invites won't work in this mode, your friends must join using your Public IP Address (or your Virtual LAN IP) and the default port Steam Community Method 2: Virtual LAN (Hamachi / Radmin VPN)