Hunt for the Decepticons
The "Hunt for the Decepticons" was an online campaign tied into the action figures released in 2010. These figures included a special insert that included a code that you could type into the Transformers.com web site to help aid in the search for the Decepticons on Earth. Set in the fiction of the movie universe, this is a cool way to keep the adventure going in between "Revenge of the Fallen" and the third Transformers movie.
When you enter the site, a voice actor doing his best Peter Cullen impersonation tells you that the Autobots need your help to track down Decepticons. Once you register and login, you are presented with a mission screen to enter codes. Each on allows you to face challenges that escalate until you finally reach Megatron. "Defeat" him and you are made part of the "Autobot Alliance".
The screen captures below are examples of the screens from the Transformers.com web site related to the "Hunt for the Decepticons" campaign. Sites change often so I took these screen captures for posterity. The screen captures below were produced from using the code that came with Sea Attack Ravage (88106399090609) and unlocked a game involving ramming down Axer in vehicle mode with Bumblebee until he is defeated.