Rename or delete steam_api.dll in the Bin folder. The game will fall back to a LAN-only mode (works on version 1.0 only).
All PCs must be connected to the same router via Ethernet cables or Wi-Fi. Ethernet is highly recommended for stability.
Place the emulator's custom steam_api64.dll file into the folder. how to play serious sam 3 multiplayer lan without steam hot
Open the and navigate to System and Security > Windows Defender Firewall .
Every computer on the network must run the exact same version/build of Serious Sam 3. Mismatched game versions will cause connection errors. Rename or delete steam_api
You need four things:
If players experience stuttering or rubber-banding during gameplay, the network priority settings may be misconfigured. Ethernet is highly recommended for stability
Ensure ports 27015 and 27016 are open if you are using a dedicated server.
If you don’t want emulators, you can use the game’s hidden feature. By default, the menu hides it.
To help tailor this setup for your specific gaming night, please let me know:
Find the original file named steam_api.dll (or steam_api64.dll ). Rename it to steam_api.dll.bak to keep a backup copy.