Back in the old v0.28.181.40d version circa 2009, I started a fort with a handful of modded critters to make it a little harder and/or weirder. I also messed with worldgen to get some crazy-ass mountains, and my embark had two good-sized mountains and a hundred-story high peak + adjacent mesa.
I'd started digging into the western mountain to build a preliminary fort as a staging ground for a vast city inside the big mesa, when a pair of supersonic fire mantas showed up. They started a wildfire that burned four of my seven starting dwarves; only my two miners and a lucky farmer survived the first month.
By the first winter, the outlook was better; a migrant wave had brought me back up to a dozen dwarves or so, and my first artifact resulted in a uranium war hammer and a legendary weaponsmith. Then an arcane dragon hauled ass into my fort and ate half my dwarves, including the weaponsmith and one of the founding miners, and cornered the survivors in the kitchens. This would be the first of many of my forts that resulted in an early legendary weaponsmith dying before the end of the first year, but in any case the other miner (who was digging some stockpiles when the beast arrived) heroically dug a tunnel underneath its feet and brained it with a pick.
The dragonslaying miner was Vabok Silverycrafted, and he soon became the mayor of Tunnelwound. He married the founding farmer, Cilob (whose surname I once knew but no longer remember), and they presided over several prosperous years during which the population rose to nearly 200. Then the goblins came.
The militia was ill-trained and ill-prepared, and quickly fell against the hordes. A large swath of dwarves were slain, and it was only by the grace of a passing caravan that the goblins were driven away. The survivors descended into a tantrum spiral, and the population rapidly descended. The surviving Fortress Guard managed to lock up the worst offenders, possibly saving the fort from annihilation; unfortunately, Vabok the Dragonslayer was among the incarcerated, and with few dwarves remaining to feed and water them, he dehydrated in prison (this was before the health care update in DF2010). Of the founders, only Cilob remained, and she became the next mayor.
The goblin invasion was the third and final catastrophe of Tunnelwound. Never again would its fate lie at the hands of invaders. Under Cilob's reign, a new militia was formed, a wall was erected, and a new barracks was built at the southern gate to head off invaders. Meanwhile, a vast tower was built inside the eastern mountain, and several decades later, it was finally finished. The Hidden Fun Stuff below the southern mountain was tapped, and the hammer lord Sarvesh Gladnessglazes slew thirteen Hidden Fire Stuff with Triflelobster, the legendary uranium warhammer. Eventually I got tired of playing with an FPS less than 1 and I quit the fort in its fortieth year. DF2010 was released a couple days later, so that was good timing.
Fort pictures: