There was a rash of news erupting today on the matter of Grand Theft Auto: IV. Here’s a quick summary of what went down:

• EB Games reported that the PS3 version of GTA IV was outselling the Xbox 360 version on pre-orders in Australia, causing some sites to report that the same was true in North America. UK retailer Asda, however, reported the same findings. HMV reports the opposite.
• Sam Houser at Rockstar told 1UP.com that there will be some differences in the game between the PS3 and Xbox 360 versions, mostly to do with the subtle differences in rendering between the consoles. (Which reminds us of the differences between Firefox and IE rendering.) Houser chooses the PS3 as his favorite in terms of visuals: “There’s a certain kind of softness without being blurry - some warmth to it - and then there’s a certain more clinical element to how the 360 looks.”
• Word has spread that a leaked copy of the game has popped up on the web, pointing to the complete impatience of some gamers. The leaked copy will supposedly run on Xbox 360 systems with the necessary mod chips. (Just — don’t plug that console into the Internet…)
• Some sites also leaked in-game footage. The complete intro was posted on YouTube, and quickly removed from the site.
• Sasha Grey, a porn actress, said she’d like to appear in a Grand Theft Auto game, “strapped with two MP5K’s and a black and grey skintight outfit”. Hype for GTA V, already?

Grand Theft Auto IV will be out on April 29.

Activision CEO Bobby Kotick has confirmed that Guitar Hero will expand with more instruments in future versions. The news is hardly a surprise, since Rock Band, which also features drums and vocals, has been doing quite well.

“We’ll include a lot of other instruments, vocals. It will help us expand internationally. It’s the first game we’ve had in which we can use local content and local bands.”

Activision hasn’t confirmed when they’ll be making this introduction, but a new Guitar Hero is scheduled for release at the end of 2008.

Guitar Hero has reached a milestone: In the 26 months since the first Guitar Hero title was released for the PlayStation 2, the rock-and-roll franchise has hit the $1 billion U.S. mark in its North American sales.

Activision, the game’s publisher, was quick to point out that Guitar Hero III broke sales records by both unit volume and dollar value for a single calendar year. Michael Griffith, Activision’s president and CEO, commented on the event:

“Guitar Hero is one of the biggest brands and one of the most powerful distribution platforms in all of entertainment today. Guitar Hero’s popularity with broad audiences is a confirmation that video games have become a true mass medium.”

The first Guitar Hero title hit the PlayStation 2 console in November 2005, and since then has spawned three sequels. The collective total sales is in the neighbourhood of 14 million units.

A big help to Activision in the dollar count is that each Guitar Hero title is sold both as a stand-alone disc and in a bundle with the guitar peripheral that allows gamers to rock-out in style rather than play with a standard game pad. Most Guitar Hero players have at least one guitar, while others purchased the new peripheral with each release, driving up the average dollar value of each sale.

Activision also said that in the weeks since Guitar Hero III was released, over five million add-on songs have been downloaded for the game.

Electronic Arts is planning to pay a little more attention to the soundtracks for its games. As a part of its “Trax” initiative, which has the game publisher paying more attention to in-game audio, the company plans to offer downloadable music that can be swapped with the background tunes for its games.

How useful the service will be probably depends on what console you’re playing on. The Xbox 360 already has the feature to import audio off of CDs or stream live music from a Windows PC — and both types can be played as the background music for pretty much any Xbox 360 game. In that case, it’s probably better to buy your music online or in-store so you’re not limited to playing it in your games.

Microsoft has announced that it will give away Undertow for free to Xbox Live gamers who download the game between Wednesday, January 23, 2008 and Sunday, January 27, 2008. The game will be available to all Xbox Live gamers, including both the paid Gold and unpaid Silver subscribers.

Undertow is a 3D underwater shooter game available on the Xbox Live Arcade. The game carries 3D graphics beyond that of most of the arcade titles available on Live, which consists of casual games available in the $10-15 price range.

The free game offering is officially a thank you to Xbox Live’s subscribers, but the game was originally promised as compensation for network troubles experienced by the Xbox Live service during the 2007 holiday season. Despite the offering, a small group of gamers has sued Microsoft for $5 million U.S. Because of this litigation, Microsoft has announced that it is unable to comment further on the downtime issue, or on the status of the Xbox Live network.