I didn't expect to ever get the opportunity to play Conquest again after I upgraded from Windows 98! If you like Civilization or other historical turn based games, or even strategy games, you'll love Conquest of the New World.
You're one of the many European countries that colonized America in the 1700s, fighting the Indians and other players to strengthen your empire in the new world. The combat system is great, really, everything about this game is a blast.