There is something special about this game, that I haven't experienced in any other game: It is for some reaosn very hard on your brain. I mean, normally I can play any game for 12-18 hours without pause if I want to (yes, I know I probably should not) but after 6-8 hours of AI War, my brain kind of shuts down and forces me to do something else.
Like yesterday, I managed to get everything ready for the final assault on motherplanet one, but when it was time to go, I decided that I was too tired, and postponed the attack to tomorrow (which is today).
I guess it is a combination of the complexity of the game and my status as a relative newbie - there is so much to remember, and there is so much that can go wrong if I make the slightest mistake.
But I do not see this as a bad thing, on the contrary, it makes me believe that this game will last for a very long time. If I manage to avoid burn-out, that is.