For more help using the L4D2 console, see our Left 4 Dead 2 Console Guide. To run commands, type them into the console and hit enter/return on your keyboard. 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.
