: On the host computer, open the Command Prompt and type ipconfig . Look for the "IPv4 Address" (usually something like 192.168.1.XX ).
To bypass these restrictions and play on a local network, you generally have three main options: using tools for a "simulated" LAN, manual console commands for direct IP connection, or local split-screen if you're in the same room. Option 1: Virtual LAN Tools (Recommended)
| Problem | Solution | |--------|----------| | Games don't see each other | Disable Windows Firewall or allow Sam3.exe through it on private networks. | | Still no LAN list | Use Direct IP join. Ensure all PCs are on same subnet (e.g., 192.168.1.x ). | | "Steam must be running" error | You didn't replace the .exe correctly – use a proper Steamless crack. | | Crash on launch | Remove any existing Steam client running in background. Also try -no_steam instead of +net_no_steam 1 . | | Different game versions | Compare Version.txt in the game root folder – update all PCs to same build. |
You need to force the game into LAN mode and bypass Steam's matchmaking. how to play serious sam 3 multiplayer lan without steam
Open Command Prompt as Admin. Find your LAN IP ( ipconfig ). Then launch the game via shortcut with these parameters:
If one PC is on 192.168.0.x and another on 192.168.1.x , LAN broadcast won’t cross. Set static IPs on the same range.
+net_no_steam 1 +connect_lan 1
file provided with the emulator, to avoid session conflicts. Host the Game Launch the game and navigate to Network Play Cooperative Start Server and ensure the mode is set to Join the Game Other players should go to Network Play Select the Search LAN
Serious Sam 3 uses UDP ports 25600 (game) and 25602 (server browser). Open these on Windows Firewall (inbound + outbound) for private networks.
✅ Yes – for offline LAN events. ❌ No – if someone in your group isn’t tech-savvy or if you have reliable internet (Steam’s built-in LAN mode is easier). : On the host computer, open the Command
: In some cases, virtual network adapters (like those from VirtualBox) can block LAN visibility. If your friend cannot see the server, try disabling these in Network and Sharing Center Direct IP Connection
On the host computer, press Windows Key + R , type cmd , and press Enter. In the command prompt, type ipconfig and press Enter.
Once your chosen emulator or network setup is active, follow these steps inside Serious Sam 3 to start the slaughter: The Host Computer Launch Serious Sam 3. Navigate to or Cooperative from the main menu. Select Split Screen/LAN or Local Game . Option 1: Virtual LAN Tools (Recommended) | Problem
Save the file. Each player on the LAN must have a unique username to avoid connection conflicts. Method 2: Setting Up SmartSteamEmu
: If playing over a Virtual LAN emulator, ensure the host has the fastest internet upload speed. If playing physically, avoid using weak Wi-Fi routers; use gigabit Ethernet cables for the best experience.