The great thing about Apple’s portable devices for fans of simulation games is that you can actually live more of a life while spending almost every waking moment tweaking some setting or researching new technology, or exploring a series of bad decisions as you go to war with your neighbor. This is a good thing. What follows are six of the most engaging simulation type games I’ve come across this week, with many of them available in the HD format for the iPad. Of course, these all work just as well with any of Apple’s smaller-screened iOS-powered devices. And they’re all great fun, enjoy. Civilization…