This is a relatively simple plugin I created for Left 4 Dead's Survival Mode.
The plugin presents players with an alert (using the centered hint box) 10 seconds before hordes or tanks spawn. It also displays a notification when a tank has been killed. The timer will start automatically when the survival event is triggered, and stop when the round ends. The plugin is enabled by default, but can be disabled by typing
"timer_switch" into console.
This has no effect on cheats/achievements, just a helpful utility.
I would like to extend the length of the programmed timers, as well as add notifications for notable lulls when it is safe to grab ammo/health. Any input would be appreciated, if there is something you think should be added just tell me the time and event and I'll update the plugin.
Update 5-11-09 16:13:
I've made some changes to the plugin to allow some more control over its behavior.
The major difference is that the alerts now go to each client individually, allowing each client to turn on or off the alerts for themselves.
Clients are notified at spawn that they may say !showtimer to enable or disable their alerts.
I've also added a cvar (survival_timer_auto) to control whether the alerts are on for all (default) or off for all when each round starts.
I added an additional cvar (survival_timer_hints) to control whether alerts appear in the bottom center hint boxes (default) or in the chat area.