Edit the line PersonaName = Player1 to change the username for each specific PC.
Now gather your friends, set up those PCs, and get ready to hear Sirian’s war cry:
The most reliable modern way to play offline LAN is by using a Steam emulator like the Goldberg Emulator How it works : It replaces the steam_api.dll how to play serious sam 3 multiplayer lan without steam hot
Go to your Serious Sam 3 installation folder. Navigate to the directory containing the main game executable (usually Bin or Bin/x64 ). Find the file named steam_api64.dll (or steam_api.dll for 32-bit systems).
: Double-check that user_id.txt contains unique values across all machines. Duplicate IDs cause immediate server kicks. Edit the line PersonaName = Player1 to change
Disable Windows Firewall or add an exception for Sam3.exe on all participating machines . 🛠️ Method 1: Using Steam Emulators (Recommended)
✅ This works because Steam Offline still allows LAN game discovery. Find the file named steam_api64
Repeat this step on every computer participating in the LAN party.
Serious Sam 3 + Lan fix ( Offline Multiplayer ) by pcmymjuegos