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Director+

A script that randomize finale stages and spawning, with increased zombie count. Almost every finale is changed, except for Sacrifice, Scavenge finales (have little changes) and Parish's gauntlet (which was absolutely perfect).

Some panic events are also extended (drainage run, No Mercy's gas stations, howitzer bridge, etc...)
Some level will also have extra item spawning, using the commentary script.

This only works on Valve's campaigns, and like many other script, only available when you host a local server/play single player.