Started a new fortress with 40.06.
At first, everything was going smoothly. A few waves of migrants guaranteeing my fort had everything at full throttle, food and drinks aplenty.
My first real problem was a Minotaur. It attacked and killed no dwarves, only injured a few of my 20 soldiers. Some seasons later, another minotaur attacks. This one managed to kill a civilian.
My fortress having a small brook nearby, I've decided to make a small underground reservoir so my dorfs didn't need to go outside. My engineering skills failed me almost spectacularly, as the water began flooding through the rest of the fortress. Good thing I had some fortifications that led to some of the underground caves, so the water didn't build up everywhere.
Side view of the flooding, more or less. Water came from the right.
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That called for some dwarf engineering. So, I've lined up 8 screw pumps over the brook and powered them with a total of 5 windmills generating 40 power each. Okay, actually I started with 4 pumps, then added more closer to where the water came. Anyway, it worked, it stopped enough flow to allow me to seal the water holes.
Some small time later, a Wereopossum attacked. To my luck, it somehow managed to get inside my walls before transforming, thus avoiding my cage traps. My soldiers dealt with it rather quickly, but two dwarves were bitten. I quickly tried to kill those two once they transformed. Well, they did die quickly, but not before biting another 2 dwarves. Soon it all went tantrum spiraling, so I just left them on their own for a while. Couple hours later, I find the game paused. A dwarf just gave birth to her second child. That was all fine, until I noticed that only two dwarves were still alive: said mother and a now orphan child. Both were also stark raving mad, going in and out of their were forms. The newborn seemed to not have the curse, but the mother being crazy and all, it died sometime later, dehydrated. I found it strange that they didn't attack the baby. Maybe it was cursed, but due to being so young, couldn't transform?
Anyway, this pretty much meant that the fortress was bound to live forever, until some army managed to get down there. Cut a few seasons later, migrants arrive. Let's see if they can survive.
EDIT1: Well, forgot to mention, but right before the tantrum spiral, a really big army of undead attacked. They came with 4 necromancers, that quickly exited the map.
The big deal was that I decided to throw my 37 soldiers at the undead (well knowing they were all underequipped). That is what really led to the spiral.
Also, while the siege was lifted, some undead still remained in the map. And guess who the 10 migrants saw along the way to the meeting hall? HINT: only 1 survived by climbing a tree.
EDIT2: The two wereopossums that are mad at my fortress? Wife and husband. Ms. Opossum just gave birth to a boy.