: Double-check your emulator configuration files. If two computers share the exact same SteamID inside their emulator settings file, one will instantly kick the other out when attempting to occupy the same lobby slot.
Method 1: Using the Built-In Developer Console (No Software Required)
Create a new shortcut to Sam3.exe . Right-click → Properties → Target. Append:
Right-click the shortcut, select , and find the Target field. how to play serious sam 3 multiplayer lan without steam
An emulator replaces the standard steam_api.dll (or steam_api64.dll ) file in your game directory to allow LAN play without launching the actual Steam client.
This is crucial. Ensure all computers are running the exact same version of Serious Sam 3 (e.g., v165507 or latest). Mismatched versions will result in a "Version Mismatch" error.
Whether you want to include steps for setups. Share public link : Double-check your emulator configuration files
Serious Sam 3: BFE via LAN without the Steam client active, you typically need a Steam emulator to bypass the game's built-in DRM and networking requirements. The most common and reliable method involves using a tool like the Goldberg Steam Emulator
Before attempting to connect, ensure all participating computers meet these basic criteria:
Double-check that all players have the exact same version installed. Right-click → Properties → Target
: All other players join this virtual network using the credentials.
Playing Serious Sam 3: BFG Edition or Jewel of the Nile with friends over a Local Area Network (LAN) is a fantastic way to experience the game’s chaotic, high-octane co-op action. However, if you are in a situation where you do not have an active internet connection, or you want to play without relying on Steam’s online servers, setting up a offline LAN match requires a few specific workarounds.
: All PCs must be on the same local network or a virtual LAN like Radmin VPN or Tailscale .
If you want to play with friends over the internet as if you were on a local network without Steam's "Join Friend" feature, use a VLAN tool: