This is an archived article that was published on in 2007, and information in the article may be outdated. It is provided only for personal research purposes and may not be reprinted.

Some players give themselves the ability to magically see and shoot through walls. Others find a way to fly, making them nearly impossible to defeat.

Cheating like this in video games has a long and even respected tradition. Games have often slyly included ways - intentionally or not - for sophisticated players to hack into the software and then skip levels or take on supernatural powers.

But these days, the subject is getting a more serious look. Unlike older games, today's are networked to be played with strangers over the Internet. And now, real money is at stake. Fantasy games like ''World of Warcraft'' and computer environs like ''Second Life,'' to name a few, have their own currency or other virtual valuables that can be traded for hard U.S. dollars.

In other words, hacking into a video game to cheat can be a business strategy. And so clamping down on it could be key to maintaining virtual worlds' economies and reputations. Even chip-maker Intel Corp. is suggesting a technology for doing it.

But one huge question is: Can cheating really be stifled?

''What I've always said is: It'll go away the same time crime goes away,'' said Tony Ray, founder of Even Balance Inc., which makes cheating-detection software called Punkbuster. ''There's always somebody trying to get around the rules.''

Perhaps, but Gary McGraw and Greg Hoglund, authors of the new book Exploiting Online Games, argue that video game makers could do much more to stop it. McGraw and Hoglund contend that poor software design enables the vast majority of cheats.

Complex games operate partly on central servers run by the game companies and partly on a player's own computer. Essentially, the individual computer reports back to the game on the mouse clicks or trigger pulls performed by the player, and the game registers the appropriate response. That's where cheating hacks often occur: Tell your computer to report 100 trigger pulls for every one actually made, and you've turned a pistol into a machine gun that racks up points much faster.

McGraw and Hoglund offer ideas for how game makers could seal up such holes. And they argue that the entire software industry needs to be watching, since these ''massively multiplayer online role-playing games'' are at the leading edge of computing.

''The kinds of problems that they are facing right now are direct indications of the kinds of software security problems we can all face in the coming years,'' McGraw said.

Most online game companies appear resigned to the fact that cheating will occur, so they try to block it by observing game play and looking for suspicious things, like avatars unexpectedly teleporting.

In one incident that could serve as a test case, Linden Lab, creator of the virtual universe ''Second Life,'' ejected a Pennsylvania lawyer and confiscated his virtual property after accusing him of cheating its land-auction process. The lawyer is suing Linden Lab in federal court for $8,000 in restitution.

''World of Warcraft'' creator Blizzard Entertainment deploys a software program called the Warden to detect cheating and ban perpetrators, but wouldn't agree to an interview to talk about it. The Punkbuster software works on many first-person shooters and is still being used in new games, like ''Enemy Territory: Quake Wars,'' in which players shoot their way through combat missions.

One problem is that these observer programs are invasive, since they must access the underlying operating system in a player's PC in order to sniff nefarious code. McGraw believes the Warden might even violate California's anti-spyware law.

Sometimes, there appears to be financial incentive for the game makers to be good - but not terrific - at stopping cheating. Consider this: Cheaters who get banned from games often immediately sign back up under a different user name, paying money for a new account in hopes of trying again. If cheating protections were significantly stronger, fewer perpetrators would continue to buy accounts.