If using an emulator, verify that the configuration file assigns a unique custom ID or username to each computer, otherwise clients will overwrite each other's connection slot. Share public link
Open it and type the official AppID for Serious Sam 3: 41070 . Save and close.
If you are using the official DRM-free version of the game (such as the version sold on GOG), you do not need Steam or any third-party emulators. The game features a built-in offline LAN engine. Launch Serious Sam 3 on all computers.
Download and install a free LAN emulator like on all participating computers. how to play serious sam 3 multiplayer lan without steam
by renaming it to steam_api64.dll.bak .
Playing via LAN without an active Steam connection is technically tricky because the game’s network protocol is heavily integrated with Steamworks. While the game includes a LAN option in the menu, it often requires Steam to be in "Online Mode" just to access the network features.
Configure your game mode (Campaign Co-op, Survival, or Versus) and map, then launch the lobby. How to Join: Launch the game on the client computers. Go to and select the LAN browser. If using an emulator, verify that the configuration
Ultimately, the core solutions boil down to these three methods:
Fortunately, if you use the right tools to emulate a local network connection or bypass the Steamworks DRM. This guide will walk you through setting up a truly offline LAN session. Prerequisites: What You Need
On the client machine (no internet, no Steam): If you are using the official DRM-free version
On client machines, select > Local Network > Join Game .
Open the text file and type the official Steam AppID for Serious Sam 3: 41070 . Save and close the file. Step 4: Play the Game
If you're having trouble with an already-cracked version:
Click (not Internet).