Limited support
 This feature is only present in Portal 2: Community Edition and Portal: Revolution. aim_touchpad_square_deadzone_yaw
🟦 Executable on Client
aim_touchpad_square_deadzone_yaw <value>
Non zero values will bias aim toward straight vertical aiming. Not recommended.
Note:
 The value is saved and will be restored on next startup.
Note:
 When running in split screen, each player has their own value.