This allows you to launch the game without Steam and see other local players in the in-game LAN browser. 2. Virtual LAN Tools
Follow the same steps as above, choosing LAN as the connection method. Method 3: Dedicated Server without Steam
are designed specifically for this purpose. They redirect Steam's network calls to a local LAN broadcast, allowing the game to function as if it were connected to a server. Download the Goldberg Emulator and replace the steam_api.dll steam_api64.dll ) file in your game's folder with the one provided by the emulator.
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 . how to play serious sam 3 multiplayer lan without steam
Every PC must run the exact same version/build of Serious Sam 3. Mismatched game versions will cause connection timeouts or make servers invisible.
If players cannot see each other, the issue is almost always Windows Firewall.
Because Serious Sam 3 natively uses Steamworks for lobby matchmaking, playing without Steam requires forcing the game into a strict local network mode. This allows you to launch the game without
Open the console and type: connect [Host's IP Address] (Example: connect 192.168.1.50 ) Press to force a direct connection. Troubleshooting Common Issues
is the preferred tool for this purpose. It essentially "tricks" the game into thinking Steam is running locally, redirecting what would be online traffic into a LAN broadcast How it works : You replace the original steam_api.dll steam_api64.dll ) in your game's folder with the version provided by Goldberg.
: Type the following command and press Enter: sam_bNetworkLAN=1 (This forces the game engine to broadcast and look for local network heartbeats instead of Steam master servers.) Method 3: Dedicated Server without Steam are designed
Windows Firewall or third-party antivirus software can block LAN traffic. Temporarily disable these, or add Sam3.exe to the allowed apps list. Phase 2: Launching the Game
Firewalls are the #1 killer of LAN games. On every PC, go to Windows Defender Firewall → Allow an app → Add Sam3.exe and allow both Private and Public.
If you are trying to play with friends who are not physically in the same room, or if the game's built-in LAN discovery is failing (a common issue), use a Virtual LAN provider.
Navigate to the game's executable folder (usually Serious Sam 3/Bin/ ).