And if they dam your river or worse, poison it without you noticing?
If they can dam the river in a way that's effective, I will be very impressed with the AI
But that's only 1 out of 5 possible renewable sources of water that I can think of (river/brook/stream, cave river, aquifer, muddy pool, ocean/lake). I suppose that's not 5 depending on how you split them. Underground pools are there, but not renewable. Ice is technically renewable due to buggy behavior (1/7 water->ice->7/7 water) or such. If they can poison it and you know they can do that, then you would have to seal off your intake and run off of reserves. Which could be very effective in a siege, but requires changes be made so that water is actually required for something, as it is currently, it's not needed for much. Assuming of course that they have unlimited poison, and can poison it as long as they're there. And that they can get to the water to poison it, which isn't very easy for all the other sources of water (poison an ocean? an aquifer? They might not be able to reach the other ones unless they can break through walls.
Only way you could get around this would be to deliberately embark in a perfect location in which case, what the hell do you want from me?
Well it doesn't require that much perfection, a water source other than an aboveground river would go a long way toward it.
Any invader worth it's salt would immediately deny you the use of any open farming areas. Walls aren't going to stop them forever and a generous application of fire would render the spot barren of useful vegetation for a long time. If you're there to repel them, well, you're fighting and having fun aren't you?
True, if they have the ability to break through walls, in addition to requiring surface areas that would help out. If they can't dig though, you could still currently make a wall out of obsidian.
Caravans aren't critical but they shouldn't be. You're gonna miss out on a lot if you just sit inside which is the point. You can just jerk off in the dark, isolated from the world but how many players would tolerate it for extended periods if they had a choice?
Not that much, you can make practically anything if you have an anvil, the rest would just be bringing metals and supplies that aren't available in your area, or that are easier to trade for then they are to make yourself.
Disabling and jamming traps would handle that. Additionally, sieges might opt to loot and ship out everything you leave lying around undefended, including jammed axe blades and their own armor. Anything useless would be burned just to flip you off and any captured immigrants and merchants would be tortured outside your gates
Well that certanly would help with a corridor of readymade traps, but it isn't just them, there's drowning or lava or such. But in general, I'm talking about the idea that a fortress only needs defense at a single location, or a single corridor, and the rest can simply be blocked off without worrying about it at all.
It's certainly realistic. Due to the very nature of the game, unless you start teleporting tunneling troops around to remove the fortress from the equation entirely, which results in the fort building, the entire point of the game, becoming completely pointless, you're not going to win.
Well it's not pointless at all, it just becomes more difficult, because instead of being able to wall off an area in 2 dimensions, to be more protected, you'd have to wall off in 3 dimensions. Like have an open space all around your fortress underground, and then have an inner layer of walls with fortifications for archers to fire out of, and then have your civilians and everything else within the core. Although that would reduce everything to essentially building a tower underground in a constructed cavern. For less developed fortresses, there's always the city guard, to patrol the corridors, and be ready for attacks from unknown directions. An aboveground tower would be naturally defended like this, tunneling enemies could only come up from the bottom layer, so you'd have your guards and defenses on the bottom few floors, unless there are flying wall destroyers. But you could still have the outer layer be space for archers to fire through fortifications.
It's the nature of the game, if the player chooses the perfect spot and plays his strengths, he wins.
Well, right now, if you choose a horrible spot, and play to building a perfect defense in a single tile, you win (or at least, don't lose).
Really, can you honestly try to claim you could devise a way with 1400 century tech to get past an underground drowning chamber? Fucking Indiana Jones would die there, plot armor or not. Now try goblins clad in full plate without Hollywood nerves
Sure you can, by not going into it.
If the drowning chamber is really the weakest point in your defenses, then you may have something there. If however the goblins know about it, and could instead smash down a tile of wall, or dig down through a tile of soil or rock and get directly into an undefended area, then that's definitely the smarter move.
Conquering other civs would pose a challenge, especially if you switch to goblins and try to capture the overengineered forts other people made. Would of course need guard posts and functioning meeting zones and whatnot or all the NPCs will just mull about outside
That might be a challenge, right now it would be an impossibility unless you could dig or deconstruct walls, and well as possibly building pumps and such. And if you could do that in the main game, that would leave a reason to break a siege to leave your own fortress, but without more it would still mean none of your fortresses would ever fall.
A well designed drowning chamber would not rely on doors not being breached. Besides, can trolls even swim? Should they? It's one thing to bust the door when the water is just rushing in but by exploiting pressure, it'll flush in so fast no mortal being would be able to retain composure and reach the door
Even if they can't swim, drowning isn't instant, and if they're dense enough, they may simply be able to walk along the bottom until they reached a door or such. And of course, there could always be those that can, frogmen, or bronze colossuses that shouldn't be effected by the water. But the latter is rare, and the former can't break down doors, and doesn't siege at all, it's always just goblins.