From Valve Developer Community
Revision as of 05:14, 20 May 2020 by Blixibon (Removed the Mapbase mention (I don't think it's relevant enough since this shows up on later games))
- These outputs each fire in response to the firing of the like-numbered
FireUser4Input; see User Inputs and Outputs.
- This output fires when the entity is killed and removed from the game.