I used to be a turtler, but now I am a rusher. I generally now take a pretender that can rush even if the army cannot. I will still turtle after the early rush is over. I just find it makes for a much more interesting game. And, if I am outclassed, it gets me out of the game early.
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Want a blend of fantasy and sci-fi? Try the total conversion Dominions 3000 mod with a new and fully modded solar system map.
Dragons wanted? Try the Dragons, Magic Incarnate nation.
New and different undead nation? Try Souls of Shiar. Including new powerfull holy magic.
In for a whole new sort of game? Then try my scenario map Gang Wars.