The new cover system makes gunplay much easier than in previous games.

When you’re not running missions for criminals, taking part in street races, stealing cars to order, or randomly causing trouble, you’ll find that there are plenty of opportunities to unwind in Liberty City. Some of these optional activities offer tangible rewards that can prove useful in missions later on, whereas others are just a fun way to kill time and take in more of GTAIV’s superb humor. For example, you can watch television, listen to numerous different radio stations, check out some genuinely funny shows (including some big-name acts) at cabaret and comedy clubs, and use a computer to surf the in-game Internet.

GTAIV’s Internet is filled with spoofs of all the kinds of Web sites that you’d only ever look at accidentally or when you know there’s no danger of getting caught. Some of them can be found only by clicking on links in spam e-mails, whereas others are advertised prominently on the search page. There’s plenty of amusing stuff to find if you spend some time in one of the "TW@" Internet cafes, but the most interesting site by far is an online dating agency through which you can meet women who, if they like your profile, will agree to go on dates with you. Dating and socializing with friends is something you can spend as much or as little of your time doing as you like, and though the people you meet can occasionally be demanding to the point that they become irritating, keeping them happy invariably benefits you in some way.

Keeping friends and dates happy means spending time with them and doing things that they enjoy, and all of them have different personalities. Some friends like to join you for minigames such as tenpin bowling, pool, or darts, whereas others prefer to go out for a meal, get drunk, or take in a show. Of course, dates are much fussier than regular friends, and their opinions of you are influenced not only by whether you pick them up on time, where you take them, and whether you try your luck when dropping them at home, but also by a number of much more subtle factors. Dates will comment on stuff like the car you drive, how you drive it, and the clothes you wear. They’ll even notice if you wear the same outfit two dates in a row, though not all of them will be bothered by it. The rewards that you get when another character likes you enough vary depending on who it is. Without wishing to give away specifics, befriending a lawyer can prove useful if you’re having trouble with the cops, for example, and having a nurse on your friends list can literally be a lifesaver.

GTAIV’s friends invariably come with benefits.

You’ll keep in touch with your dates, friends, and some of your enemies using another of GTAIV’s great new features: a cell phone. It’s hard to believe that something as simple as a cell phone could add so much to a game like this, but it’s implemented so well that it’s hard to imagine leaving any of Niko’s safe houses without it. If you’ve ever used a cell phone in real life, you’ll have no problem operating this one and, given that it’s controlled using only the D pad and a single button, it’s easy to call up acquaintances and take calls even while driving. There’s no unwieldy conversation system to deal with; you simply choose which friend you want to call, what you want to talk about (it could be work, a fun activity, or asking for a favor) and then, assuming that he or she answers the phone, the conversation plays out. Incoming calls are even easier, though they occasionally come at inopportune (or amusing) times; hearing your cell-phone’s signal interfere with your car radio is the least of your worries when you consider the possibility of a date calling you while you’re with a prostitute or embroiled in a gunfight with the Mafia. Incidentally, new ringtones and visual themes for your phone can be purchased via the in-game Internet, which is typical of the incredible attention to detail that you’ll come to take for granted as you play.

To give you some idea of just how much thought has clearly gone into the crafting of GTAIV, even the act of stealing a parked car, which is still achieved by pushing a single button, can now result in any number of different things happening. If the door is locked, as is often the case, Niko will smash a window with his elbow or his foot to get inside. Once inside the car, he may need to hot-wire it to get it started; you can speed up the process slightly by using the shoulder buttons on your controller. If the car has an alarm, it’ll sound for several seconds and cause the headlights to flash on and off as you drive away--practically begging any nearby cops to come after you. Stealing cars with drivers and/or passengers inside opens up lots more possibilities, the most amusing of which is someone (possibly you) getting an arm caught in a door and dragged along as the vehicle speeds away.

Most of the vehicles in GTAIV, like those in previous games, have very loose handling that makes it easy for you to perform Hollywood-style U-turns, skids around corners, and the like. You can play through most of the missions without ever violating a traffic law if you really want to, but you can get away with (and will have a lot more fun) driving like a lunatic, provided that you don’t collide with any police vehicles or mow down too many pedestrians. A neat touch when driving with the default camera view is that the camera, which is positioned a few feet behind the rear bumper of the car, centers on you rather than on the vehicle, effectively offering the vehicular equivalent of an over-the-shoulder view. When you take the control of something sporty, the camera also positions itself much closer to the ground, which adds to the sensation of speed.