Since you aren't using official Valve servers, you need a virtual LAN to find your friends.

Once you are on the same virtual network, follow these steps to start the match:

: If you see this, make sure the steam_appid.txt file in your game folder contains the correct ID (usually 480 for the Spacewar fix).

To play online with a cracked version, the game needs to "trick" Steam into thinking you are playing a free game (like Spacewar ).

: Even for a crack, you must have the Steam Client installed and running in the background.

: Ensure every player is exactly on v2.2.1.2 . If one person has a different update, they won't be able to connect.

Surviving the zombie apocalypse is better with friends, even on a budget. Since version is a specific older build of Left 4 Dead 2, you'll need to follow these steps to bypass the "Steam is not running" errors and get into a lobby with your squad. 1. Preparation & "Steamworks Fix"

Explain how to set up so two people can play on one PC.