Left 4 Dead
Skip intrduction cinematic video
You can also add the following to the launch options to skip the intro:
-novid
Local splitscreen co-op
Local splitscreen co-op is possible using a combination of gamepad and keyboard/mouse.
Borderless fullscreen windowed
Set the Steam launch options:
-noborder -window
Force a specific resolution
Set the Steam launch options:
-w <width> -h <height> Ex: -w 1920 -h 1080
Force a specific refresh rate
Set the Steam launch options:
-refresh <rate> Ex: -refresh 60
Restore video & performance settings to default
Set the Steam launch options:
-autoconfig
Note: Ignores settings inside any .cfg files until this parameter is removed.
Save game cloud sync
Steam Cloud: cfg files are synced automatically
Console Commands
Games running on the source engine can utilize Source Engine Console Commands for various tasks.