The Energon Pub

Approximately one month before its release, ten soundtracks were provided free of charge as a downloadable file over the Internet, requiring the use of DirectX software to be heard. However, with the exception of the track that would become #19- "Optimus VS. Megatron", they were all altered, shortened, or mixed-together versions of what would be released onto the official CD, though indeed containing original score music heard in the film-

Aftermath (Track #20- "No Sacrifice, No Victory")
Blackout Attacks (Track #8- "SOCCENT Attack")
Bumblebee Captured (Track #16- "Bumblebee Captured")
Scorponok (Track #10- "Scorponok")
The Final Battle (Track #17- "You're a Soldier Now")
The Final Battle, Part 2 (Track #19- "Optimus vs. Megatron")

Four tracks included in this file were not included in any way at all in the official CD release:
"Autobots to the Rescue"- played right after Optimus Prime rips the roof off a Sector 7 truck, and all of the Autobots come to take Sam Witwicky and Mikaela Banes away.
"Barricade"- played during the scene where Decepticon Barricade confronts Sam Witwicky in the parking lot overpass, and Bumblebee arrives to carry him and Mikaela Banes away from the police car 'monster'.
"Bumble-Stumble"- just after Starscream shoots at the Autobots in Mission City and Bumblebee has lost the use of his legs; it also covers Brawl's opening attack, and ends just before Ironhide transforms in slow-motion.
"Soldiers Arrive"- played during the scene where the soldier Captain William Lennox and his team land on the Soccent Airbase in Qatar.