Update: The two Disturbed tracks listed below will be released as publicly available downloads for PlayStation 3 and Xbox 360 in June, a representative from Harmonix and studio owner MTV Games informed Shacknews. No price point was provided.

Original Story: Mega-retailer Best Buy is offering two exclusive downloadable songs for Harmonix's multi-instrument title Rock Band to those who pre-order the next album from thrash metal group Disturbed.

Upon pre-ordering the Indestructible album from BestBuy.com, the code for an Xbox 360 download of the tracks will be send via e-mail. Both hailing from the new album, the songs are:

• "Inside the Fire" by Disturbed
• "Perfect Insanity" by Disturbed

Though this marks the first time a retailer has pushed album pre-orders via DLC, it's not the first time that a band has released songs from an upcoming album as DLC. Motley Crue previously debuted its latest single within Rock Band, and Def Leppard pulled a similar stunt with Neversoft's Guitar Hero III.

Furthermore, the GH3 soundtrack used a similar method to drive sales, as it contained a download code for several exclusive playable tracks.

It is unknown if the above two tracks will eventually be released publicly or for the PlayStation 3, though it is likely given the eventual availability of the exclusive OXM track pack.