Grimrock

First, on the hidden pressure plates I uncheck the silent option, but once I save the map and open it up again all the boxes are checked silent. Is this a bug or something I don't understand?

Second question is on spawners. I'm using a lever and timers to spawn 4 mobs 20 seconds apart. That part works fine, but I only want them to spawn once. Is ther a way to make them only space once other than putting an astronomically big number in the respawn option? Also does the game keep track of if a spawned mob has been killed or not, in other words I leave a spawner to go unchecked will it go until it fills up the room?

Thanks in advance for any help.

You'll probably just want to script the spawns as one time only events. It would fill up the room if you left it going.

Thanks,

I'm not up to scripting yet, so I'll find a workaround somehow.

then I guess a really crazy huge respawn time will work

One possibility comes to mind:
First, use a button instead of a lever, so you can set it to only activate once. Now create 3 timers, set to 20, 40 and 60 seconds, and connect them all to activate the spawner. Connect each timer to itself and, upon activation, tell it to deactivate itself. Connect the button to the 3 timers and the spawner too, so you get the first monster when you press it. Finally, place a blocker on the same square as the spawner, so you shouldn't get any monsters spawning on top of each other. You can connect everything to one spawner, or use separate spawners if you prefer.
I think that should do the trick.

You could also simply add a 2nd timer set to 80 (I would actually go 82 to be safe)to deactivate the first timer and itself.

Thanks Sutekh.

The problem wasn't the spawners but the timers. I thought the spawners were respawning on their own based on the cool down period, when actually the timers were just reactivating them.
Connecting the timer to shut itself down after one cycle solved the issue.