Last Month, TechShout! says (in Halo Wars of the Halo franchise dated for release)  India - Dec 11, 2008
An added bonus for the owners of Limited Collector’s Edition (LCE) is the access to in-game “Halo 3” Mythic Map Pack. The LCE has been priced at $79.99 ...

And Portal IT says (in Halo Wars: The US Gets The Last Release Date)  Romania - Dec 9, 2008
Microsoft will also release a Limited Collector’s Edition ($79.99), which includes the following: - Three new Halo 3 (not Halo Wars) multiplayer maps: ...

And DailyGame says (in Halo Wars Confirmed for March 3 on Xbox 360) Talk Xbox
 - Dec 8, 2008
LCE owners will also get early access to the in-game Halo 3 Mythic Map Pack. The Limited Collector's Edition retails for $79.99. The standard edition is the ...
Halo Wars Gets A Couple Different Release Dates Talk Xbox
Halo Wars Coming In March Cinema Blend

And TeamXbox says (in Halo Wars Dated, Limited Collector’s Edition Announced) Monsters and Critics.com
 CA - Dec 8, 2008
As an additional exclusive, LCE owners will get early access to the in-game “Halo 3” Mythic Map Pack. The Limited Collector’s Edition retails for an ...
The Next Chapter in the Halo Saga Gets a Date IGN
all 3 news articles

And IGN says (in The Next Chapter in the Halo Saga Gets a Date)  CA - Dec 8, 2008
Those who fork over the twenty extra bucks will also get exclusive early access to the Halo 3 Mythic Map Pack. Halo Wars, both Limited and Regular Editions, ...

And Talk Xbox says (in Halo 3 Legendary Maps Going For Cheap)  - Dec 1, 2008
According to Nelson the Halo 3 Legendary Map Pack will get a price cut. The content which used to go for 600 MS points, will now be available for 400 MS ...
Halo 3 leads Xbox Live holiday deals GameSpot
all 2 news articles

And bs angel from hawtymcbloggy.com says (in Discounted Legendary Map Pack Starting Tomorrow) Source [Major Nelson] and [Bungie.net] Posted in Halo Heaven, Video Games, Xbox       If you haven’t yet purchased the Halo 3 Legendary Map Pack, when you’re done explaining to me why you’re such a n00b, starting tomorrow you will be able to hop on over to the Xbox Live Marketplace and pick...

And EL33TONLINE says (in Halo 3: Recon name chance trailer)  South Africa -
Halo 3: ODST will be releasing ‘next fall,’ while the Halo 3 Mythic Map Pack will be hitting Xbox LIVE Marketplace early next year. ...

14 Months Ago, luke@ferrago.com (Luke Guttridge) from Play.tm says (in Halo 3 Heroic pack arrives) As promised by Bungie yesterday, the Halo 3 Heroic Map Pack is now available on the Xbox Live Marketplace. The pack delivers three new maps which can be yours for 800 Microsoft Points.