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A dissected button_keypad prefab.

button_keypad is a prefab located in the Prefabs HL2 folder, containing a keypad setup.

This prefab is comprised of two entities

When pressed, the func_button is configured to make a specific sound and make the model briefly display "*ERROR*" message on the readout portion of skin.

Tip.pngTip:By changing the sound of the func_button, adjusting the skin property to be switched to "1" instead of "2", and adding an output to another entity, you can easily have the keypad grant access to something instead.