Follow the same steps as Method 1, using the Local Network option in the game menu. Troubleshooting Common LAN Issues
: If clients cannot see the host, the Windows Firewall is likely blocking the game. Go to Control Panel > System and Security > Windows Defender Firewall > Allow an app through Firewall . Ensure Serious Sam 3 has both "Private" and "Public" networks checked.
Ensure both and Public checkboxes are checked for the game. Repeat this process on every participating computer. Step 5: Launching and Hosting the Game how to play serious sam 3 multiplayer lan without steam
To ensure successful connections between computers, configure the IP addresses as follows:
If you and your friends are not in the same room but still want to bypass Steam’s matchmaking servers, you can use Virtual LAN software to simulate a physical local network over the internet. Follow the same steps as Method 1, using
: Navigate to your Serious Sam 3 installation folder. Open the Bin folder (usually found under Serious Sam 3\Bin\ ).
: On the host computer, open the Command Prompt ( cmd ), type ipconfig , and look for the IPv4 Address (e.g., 192.168.1.5 ). Ensure Serious Sam 3 has both "Private" and
No emulators, no INI editing, no firewalls dancing.
: The host creates a private network inside the software and sets a password.
: Ensure the game's executable is allowed through the Windows Firewall on all participating PCs. 🕹️ Steps to Play Install the LAN Fix :
Serious Sam 3 + Lan fix ( Offline Multiplayer ) by pcmymjuegos