This is mainly determined by the size of galaxy map you generate. If you want a fast game, choose a tiny galaxy and things will move quickly due to rapid contact with the other factions, and a limited time for moving down the tech tree before a faction can win the game. A game like that might end in a few hours of constant play, depending on how good you are. A game played on a huge or immense galaxy size can take weeks to finish, depending on how much gaming time you have. You can also set the speed of tech development for each game, which will impact the overall pace to some degree.
That's also related to galaxy size and number of habitable planets generated (it's possible to choose a huge galaxy with few habitable planets, or vice versa). In a galaxy with many habitables, it can require a lot of micro towards the end of the game when you're controlling so many systems. Of course if you're dominating the end-game, you can just use a Terror Star and smash the systems you don't need, and turn them into mined resources.What depth of micromanagement needs to be used for planetary admin?
On the whole though, I'd say the micro isn't bad at all, compared to other games. It's important to check individual planet settings in the early colonization phase, when money is tight and decisions are critical. Later on, I slack off and only check in detail at intervals, stacking up improvements and using the overall empire economic slider controls to keep things rolling along. There are AI governers you can set for planets too, to help with the micro, but I tend not to use them.
One downside of GalCiv (IMO) is that the economy is set up in a somewhat non-intuitive way, and it can take a while to figure out how to use the master economy control sliders. I'd recommend reading the GalCiv2 Wiki before playing.
Yes to all the above. You can also control the skill level and economic bonus/penalty of the AI (including randomized, so each alien has randomized smarts), number of anomalies, number and race of aliens, whether or not random events shake up the galaxy, speed of tech advance, and which of several victory conditions you want enabled.Can you configure the game for different sizes and densities, and are maps randomized?
For me the randomized map generator is what keeps the game interesting. You never know how close the neighbors are, and what you'll be dealing with, until you start to colonize, explore, and open up the map. Very high replayability factor there, especially if you use randomly selected alien races.
GalCiv2 may not be ideal if you want to start and finish a game in that timeframe. You'd be limited to the smallest map sizes, and you won't experience the full depth of the game that way. It does lend itself to playing a long game through short gaming periods though. For me it's easy to jump in for an hour or two when I have the time, because it's not so complex that I lose track of what my strategy is, or where all my assets are. It's actually easier than M2TW to play that way, because I'm always forgetting where all my agents are, and what they're supposed to be doing.I think I need a game I can play for 2-3 hours at a time without getting too sucked in, and the 3am MTW sessions are starting to annoy my better half.
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