Grand Theft Auto 4 and Episodes from Liberty City are now backwards compatible on Xbox One.
Rockstar's greatest hits are heavily discounted this weekend on the Humble Store.
Exclusive games and downloadable content are "critical" for the Xbox 360, Microsoft has said.
Exclusive content - even if it's only for a set period of time - is crucial for differentiating the Xbox 360 from the PlayStation 3 and Wii, Microsoft's European boss Chris Lewis told Eurogamer.
"They are important," he said. "DLC windows of exclusivity are critical for us for differentiation. We'll continue to bring those exclusives through our own studio work, Gears and Forza and other titles."
Rockstar has decided to bundle up the Grand Theft Auto IV family into a special edition compilation due out in the States at the end of this month.
Stab-'em-up series Assassin's Creed will be as big as Grand Theft Auto "in the not-too-distant future", Ubisoft reckons.
Just a few weeks after the game's release, Take-Two has announced that more than 5 million copies of Rockstar's Red Dead Redemption have now been shipped.
Rockstar has told Eurogamer it cannot comment on how long the Grand Theft Auto IV downloadable content was exclusive to Xbox 360, although in hindsight it appears to have been a 12-month deal.
Just under 14 months elapsed between The Lost and Damned appearing on Xbox Live and its eventual appearance on PS3 this month, suggesting the deal may have been measured from the release of the first add-on (the second, The Ballad of Gay Tony, arrived relatively recently on Xbox 360 and is already available for PS3).
Microsoft also wouldn't verify the length of the exclusivity deal to Eurogamer. The platform holder reportedly paid millions and millions of dollars to secure it in 2006. Sony pointed us back to Rockstar and Microsoft.
Sony has updated the PlayStation shops with all manner of treats - and the promises of the GTA IV downloadable episodes, which are both due to go live tomorrow.
Rockstar has announced that The Lost and Damned and The Ballad of Gay Tony have been delayed on PC and PS3 due after Sony asked for some changes.
Games industry analyst Mike Hickey has said a Grand Theft Auto V announcement may be on the way - and that it could be made before E3 kicks off in June.
"There is building suspension for a pre-E3 GTA V announcement," he said, as reported by Industrygamers. "Although we expect nothing from Rockstar at this year’s official E3 event."
Rockstar is more likely to hold a separate press event and make the announcement independent of any publisher conferences, apparently. That's because GTA V really is kind of a big deal.
Former Tory leader Iain Duncan Smith has claimed videogames are messing up the kids with their crazy violent ways.
Rockstar has confirmed a UK price for the disc featuring both episodes of the Grand Theft Auto IV DLC.
Rockstar has told Eurogamer that it currently has no plans to show anything at E3, although that may not rule out announcements during the show.
TIME magazine has named Grand Theft Auto royalty Sam and Dan Houser in its annual list of the most influential people in the world.
Microsoft's Aaron Greenberg has said that Grand Theft Auto IV: The Lost and Damned is "the most successful game add-on content we've ever launched" on Xbox Live.
Rockstar Games has now shipped over 13 million copies of Grand Theft Auto IV worldwide for PS3, Xbox 360 and PC.
Microsoft has announced the shocking news that the first batch of DLC for Grand Theft Auto IV is massively popular..
Rockstar VP of development Jeronimo Barrera reckons The Lost and Damned plot has more quality than most other mainstream media.
Rockstar has popped out a patch that rectifies the GTAIV censorship mix-up reported yesterday.
Word sweeping the internets is that Grand Theft Auto IV: The Lost and Damned features full-frontal male nudity in one of its mission cut-scenes.
A new range of GTA IV avatar clothing has appeared on Xbox Live to celebrate the release of The Lost and Damned.
Rockstar development chief Jeronimo Barrera believes Grand Theft Auto IV: The Lost and Damned packs a full game's worth of content and sets a new benchmark for downloads.
Rockstar has revealed that the GTAIV: The Lost and Damned soundtrack will include a mixture of rock and metal songs to complement the story and a lot of new hip-hop to serve fans of The Beat 102.7, the original game's most popular radio station.
MTV reports that Lost and Damned, where you play biker Johnny Klebitz, promises a new death-metal show DJed by Max Cavalera on the Liberty City Hardcore station, while Liberty Rock and Radio Broker both include new tunes as well.
The new additions will be also weighted to play first so that they don't blend into the background of the game's already-extensive soundtrack, the site adds.
Rockstar has confirmed that Grand Theft Auto IV: The Lost and Damned will cost 1600 Microsoft Points (GBP 13.60 / EUR 19.20) when it's released on 17th February.
Rockstar has reportedly announced the full list of Achievements for the first batch of GTA IV content, subtitled The Lost and Damned.
The new downloadable content for Grand Theft Auto IV will premiere at the 2008 Video Game Awards next week.
The new downloadable content for Grand Theft Auto IV will be available in shops as well as via Xbox Live.
Rockstar has revealed that the GTA IV downloadable content announced today will include new multiplayer modes, new weapons and vehicles, and a soundtrack with new music.
The first downloadable content for the Xbox 360 version of Grand Theft Auto IV will be released on 17th February.
Rockstar bigwig Dan Houser has said he doesn't know when the downloadable content for Grand Theft Auto IV on Xbox 360 will be released.
John Schappert, the man in charge of Xbox Live, has admitted he's no idea when we'll see the downloadable content for Grand Theft Auto IV.
Microsoft has confirmed Grand Theft Auto IV downloadable content will be coming to Xbox 360 in time for Christmas.
There was a bit of confusion, you may recall, after Take-Two suggested it could be released as late as January 2009.
But yesterday's press release announcing the Xbox 360 price cut stated, "The first of the Xbox 360 exclusive downloadable episodes for this record-breaking game will be available this autumn - the only console with new Grand Theft Auto IV content available this Christmas."
Sources close to Rockstar North have told Eurogamer that downloadable Grand Theft Auto IV content is on track for a late November release.
As part of its Q2 financial reports, Take-Two has admitted that episodic content for Grand Theft Auto IV on Xbox 360 has been delayed from fiscal Q4 2008 to Q1 2009, GamesIndustry.biz reports.
With GTA IV available today, Microsoft is continuing its campaign to remind people that Xbox 360 offers unlockable Achievements and will have downloadable content later this year.
Sony has dismissed the exclusive episodic content for the Xbox 360 version of Grand Theft Auto IV, claiming that a "large percentage" of gamers will be unwilling to fork out for it - at least to start with.
Sony America marketing man Scott Steinberg believes there is more than enough content in the launch version to keep you occupied.
"Perhaps [Microsoft will be] shipping some episodic content in the fall, but there is a whole lot of product shipping on the PS3 in April and I personally don't think there's going to be a huge percentage of folks who [will] jump into downloadable content for another price when they're still playing through the core product," Scott Steinberg told GameDaily.
Take Two has said that it plans to release "additional episodic content for Grand Theft Auto IV" in fiscal 2009.
Microsoft has revealed that the Grand Theft Auto IV downloadable content it has signed up for 360 will be released in the autumn.
Take-Two has announced in a conference call that it intends to release more exclusive Grand Theft Auto IV episodes for the Xbox 360 in 2009, GamesIndustry.biz reports. (We might do some work of our own later. Who knows?)
Take 2 has refused to clarify comments from chief financial officer Laine Goldstein that suggest the publisher received USD 50 million (EUR 37.3m / GBP 25.2m) from Microsoft for exclusive GTA IV episodic content, GamesIndustry.biz reports.
Although some got a bit overexcited during E3 when Grand Theft Auto IV appeared on Peter Moore's bicep (and Xbox 360), this time there really is a Rockstar exclusive to talk about.
At X06 this evening, as you've doubtless already gawped, the platform holder revealed that it had asked Rockstar to "throw us a bone" - and said bone will take the form of two 360-exclusive extra episodes, offering "hours" of extra gameplay.
These will be released in the aftermath of GTA IV's main release, which is set to take place in October 2007 on both 360 and PlayStation 3.