I've finally started to grasp this game, dabbling with military, keeping nobles happy and even trading and started to see some patterns in how I play. I almost always try to build a huge multi layered outer defense, several moats. Huge towers where crossbowmen can stand and bridges used both to prevent easy access but also weapons. I've haven't had any real siege yet but a large band of goblins did once try to steal my baby dwarfs so I dont know yet how my defenses would stand but I've come to the conclusion that no enemies can be allowed inside the mountain so I need a self destruct device.
One idea would be to dig a moat around the entire map, leaving just a few tiles at the edges and only one way in which would also aid my defense and dig to the lowest Z level. At that level I'd dig up almost the entire level and then adding supports. I'm not sure that this would work but the plan would be to collapse the entire mountain to deny the enemy my dwarf booze.
Another Idea would be some sort of flooding mechanism using magma since I wouldn't want anyone to drain the water and capture my fort. Maybe dig out so that the entrance is lower than the magma pipe so I wouldn't use pumps to keep the fort filled, just in the beginning to make for a quick destruction.
Ofc this then leaves the problem with how to activate this self destruct as no self respecting self destruct cant work without a timer and a big red button or lever. Preferably time would be counted down to the sound of a sexy female voice or maybe a dwarven burp marking the end is near.
I was thinking about several layers of protections for the key that would allow easy access yet possible to use in a hurry, the safety would be needed so no drunk dwarf falls asleep at leaning against the wrong lever.
First I think two levers would have to be levered revealing access to a pleasure pad, the bad would lower a drawbridge or something granting a single dwarf the pleasure to walk over to the main lever, ofc the lever would be stationed at a platform with only a small access ramp and any dwarf would have die most horribly. After master activation a gate would open where a small tunnel would be filled with magma or water, when the tunnel is filled and enough pleasure has built up this would push another pleasure pad(this would act as a timer). And now the magma would start to flow, at this point all dwarfs would be assigned to the pumps, first the booze and other important items be destroyed and last the pump room, when appropriate another timer would start so that once all dwarfs are dead water would flood in and forever sealing their fate. Water could also be used to make sure that the entire fort is turned to stone, (if possible)
What do you think? Would any of these ideas work?