Assigning static local IP addresses (e.g., 192.168.1.50 , 192.168.1.51 ) prevents connection drops. Configure Windows Firewall:
If you and your friends are not in the same building but still want to use the offline LAN feature of Serious Sam 3 without utilizing Steam's friend networks, you can use a Virtual LAN (VPN) tool to trick your computers into thinking they are on the same local router.
: Find the line reading PersonaName = "Player" and change it to a unique nickname for each computer (e.g., PersonaName = "Sam_PC1" , PersonaName = "Sam_PC2" ).
Look under the tab. The host's server should appear automatically. Select the server and click Connect . Alternative: Connecting via Developer Console
Go to the Serious Sam 3 game folder where the main executable resides ( Bin/ ). Find the file named steam_api.dll (or steam_api64.dll ).
Select or Local Network option rather than Online.
If you are running copies of the game that cannot authenticate with Steam due to strict offline environments, open-source Steam emulators can trick the game into thinking it is running on a live Steam network via local LAN broadcasts. Step 1: Download an Emulator
Playing Serious Sam 3: BFE over LAN without Steam requires using virtual LAN tools like Radmin VPN or Hamachi, as the game often requires an initial internet connection for authentication. Users should install these tools to create a virtual network, temporarily disable firewalls, and use the "Search LAN" option in the game's network menu. For a detailed walkthrough on using Hamachi for this game, visit hamachinetwork.info
Adjust variables such as gamemode (e.g., Co-op or Deathmatch) and max_players . Save the file and restart your dedicated server shortcut. Step 3: Connect the Client PCs
You will need two specific files generally found in "Serious Sam 3 LAN Fix" packs:
If you want to play on separate computers without Steam, you can bypass the standard matchmaking lobby by connecting directly via your local IP address.
Serious Sam 3: BFE is a chaotic masterpiece of first-person shooting. While the game officially requires Steam for online matchmaking and network features, many players want to relive the glory days of LAN parties—without an internet connection, without Steam accounts, and without the hassle of DRM.
Launch Serious Sam 3 directly using the Sam3.exe executable file. Do not open or run Steam. On the main menu, select . Choose Versus or Cooperative depending on your preference.
If you are using the (the most reliable modern method), you must configure your identity manually.
: Launch SmartSteamLauncher.exe . This emulates a Steam environment specifically for the game. 3. Essential Network Configuration