Like brad just said (to me) its mostly tedium and micromanagement with a steep learning curve. And building a fortress deep under ground. Trying to get a bunch of manic depressive alcoholics to do your bidding, and occasionally accidentally flooding the world with magma, accidentally flooding your fortress, accidentally releasing the wrath and horror of hell or succumbing to the grips of a tantrum-spiral after a already unhappy dwarf has his kitten killed by a goblin ambush. Its allot of work with zero pay off. There is no way to win, unless you count losing in some interesting or glorious manner winning

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You tell the dudes to tunnel, construct building and produce goods. You tunnel and mine to find ores to smelt and make into armor, weapons or trap parts. Dig channels and route water into underground reservoir that you excavated for that purpose, just don't forget about water pressure... and make sure the guy installing the floodgate is standing on the correct side before flooding the channel!
Basically, its inexplicable entertaining. Like watching and ant colony, but you have to keep them liquored up and sometimes the ants get depressed, possessed. or just decide to throw a party that brings the entire colony to a halt.
So yeah, you should give it a try. We are here to help.
P.S. You should read this if you have any further questions about what a succession game is:
http://lparchive.org/LetsPlay/Boatmurdered/intro.htmlThat's an older version of the game, but most things still apply.