If you aren't in the same physical room or the game's built-in LAN discovery fails, use a Virtual LAN tool. Radmin VPN
One player must create a secure private network room and share the credentials with the group.
This method bypasses ALL Steam authentication. The game becomes truly offline, portable, and LAN-ready. It works on Windows 7, 8, 10, and 11. how to play serious sam 3 multiplayer lan without steam hot
To play in multiplayer LAN without an active Steam connection, you generally need to use a "LAN fix" or virtual LAN software to bypass Steam's online authentication requirements. Method 1: Using Virtual LAN Software (Recommended)
⚠️ This assumes you own a legitimate copy but want to bypass Steam’s online requirement for a pure LAN party, or you’re using a standalone version that doesn’t require Steam. If you’re using a cracked copy, the same principle applies, but replace the Steam files accordingly. If you aren't in the same physical room
Choose Cooperative (Campaign), Deathmatch, or Beast Hunt. Session Name: Give your game a recognizable name. Max Players: Set the number of friends joining.
If you are in the same room and only have one PC, you can play without any networking setup at all. The game becomes truly offline, portable, and LAN-ready
All other players must click and enter the designated name and password. Step 2: Configure the Game Launcher