For some, pressing the ~ (tilde) tilde key will work. Once enabled, you can open the console by pressing the ` (grave) key on your keyboard. To do this, go to Options > Keyboard/Mouse > Allow Developer Console > Enabled.
You can turn on the console in L4D2 by changing the developer console setting to enabled. These L4D2 cheats are up-to-date for the latest version of the game on Steam, working for both single player and multiplayer.
Below is a searchable list of 116 cheats and console commands from Left 4 Dead 2 on PC / Mac.
