It's a fairly old game that's now available on Steam. It's similar to Age of Empires and older versions of Civilization, but it's still pretty good IMO. The fact that it's an older game means that matches are quick to set up and play. I still play it every now and then, but only on moderate difficulty. Usually I build around 3 or 4 cities while gradually building up an invasion force, which I let loose around the Industrial Era (or earlier, circumstances permitting) with early aircraft. Of course, focus on resource gathering early. Other than that, I use different tactics in each match.
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It is easy to go down into Hell;
Night and day, the gates of dark Death stand wide;
But to climb back again, to retrace one's steps to the upper air –
There's the rub, the task.
– Virgil, The Aeneid (Book VI)