It's important to keep your city folk happy, or they might revolt - and no, you can't slip anything into the water supply. In Sid Meier's Civilization III: Complete, you plant the seeds of a new civilization and guide it turn by turn toward world domination through brute force, economics, technology, cultural influence, or by fulfilling scenario objectives. Civilization III: Complete has tons of enhancements and features, but it's too bad that it took a while for it to be released - PC gamers have been playing Civilization IV for months. 

Zoo Tycoon 2

Don't feed the animals - but blowing bubbles at them is OK. The latest version of Zoo Tycoon has new play modes, enhanced environment-editing tools, more park objects, and more animals to choose from - all great additions that boost replay value and challenge you to build bigger and better zoos. 

The Sims 2 University

We're geeks, so writing our semester term paper takes priority over partying. The Sims 2 University expansion lets you take your Sim through four Sims-years of college, attending classes, doing assignments, and taking exams, all while making new friends, adjusting to dorm life, and (if you wish) rushing a Greek house - but by the time graduation day rolls around, this school has become a bit of a grind. 

RollerCoaster Tycoon 3

You can experience any of the rides from the perspective of the CoasterCam. Despite the fact that RollerCoaster Tycoon 3 is the third game of the series, it's the first to appear on the Mac. From building rides to controlling finances, you get to play Michael Eisner (oops, we mean Robert Iger) and manage every aspect of an amusement park. Your goal? Build thriving parks that make lots of money so you can move up the entrepreneurial ladder. 

Myst V

Some puzzles are as complicated as they look - and even those that don't look complicated usually are. In the beginning, a weird book fell through a rip in the sky and transported us to a mysterious island filled with abstract puzzle after abstract puzzle - that's how millions of gamers fell in love with (and plenty of others learned to loathe) the puzzle-laden world of Myst over a dozen years ago. For fans of the series, Myst V: End of Ages ends the saga triumphantly, but if you've ever tried and hated a Myst game before, you'll find nothing here to make you want to open this book again.