game_player_manager

This entity is not in the game by default, but got left over in the FGD.
This feature is not available anymore.

game_player_manager is a cut logical entity available in all Source games. When a player joins a server, the player will fire OnPlayerJoin and OnPlayerSpawn outputs on entity with this classname. A player who respawn will also fire OnPlayerSpawn output, or if respawn after death or joined a valid team (except spectators). In both outputs the player will always contain self as both !activator and !caller. These outputs are the only mentions that confirms this entity ever existed or was planned and was designed to fire inputs for (at least) these actions. It has no source code leftover.

Outputs

OnPlayerJoin <void>

Fired when a player joined the server.

OnPlayerSpawn <void>

Fired when a player respawn after death or joined a valid team (except spectators). Also fired when joined the server.