Autobot: The War Game

He taking on the form of a Camaro then defeats a group of Decepticon drones.
After learning Sam Witwicky is going to buy a used car, Bumblebee goes to Bobby Bolivia's Used Carlot and is bought by Sam.
Later, Sam and his girlfriend, Mikaela Banes, are attacked by a Decepticon, Barricade, but Bumblebee saves them.
Bumblebee fights Barricade, while Sam and Mikaela escape. After defeating the Decepticon, Bumblebee finds Sam and Mikaela, who thank him for saving them.
Optimus contacts Bumblebee, telling him that Sam has the artifact that contains the location of the AllSpark, and Bumblebee must protect Sam at all costs.

Optimus Prime, Ironhide, Ratchet, and Jazz land on Earth, assume alternate forms (a Peterbilt 379, a GMC Topkick, a Hummer H2 Search and Rescue vehicle,
and a Pontiac Solstice) and meet with Bumblebee, Sam and Mikaela. Sam gives them the artifact, which turns out to be his grandfather's glasses, to Optimus,
who explains to Sam and Mikaela the mission of the Autobots in Earth: they are in the search of the All Spark,
a powerful artifact which is the source of life of all Autobot: The War Game.
Ratchet reveals Sam's grandfather discovered their enemy, the Decepticon leader Megatron, trapped in the Arctic.
Megatron burned the information of the All Spark's location in Sam's grandfather's glasses so the Decepticons could find the All Spark.
Afterwards, Mikaela sarcastically states that she is struggling with why Bumblebee disguised himself as such a "beater", and in response,
Bumblebee scans a new and improved yellow Camaro as his new alt-mode.
Bumblebee battles Decepticon drones.

They can use it to revitalize Cybertron, the homeworld of Autobot: The War Game.
Ironhide detects Sector 7 helicopters and Prime orders Jazz to create a diversion so that the Autobots, Sam and Mikaela can escape.
In doing so, Jazz is cornered by Sector 7 agents. Ironhide rescues Jazz from Sector 7, and manages to defeat several drones on the way.
After defeating the drones, Ironhide discovers that Sector 7 is trying to capture Bumblebee.
Prime tries to rescue Bumblebee but he fails to save his comrade as he is taken away by Sector 7, partially because of Shockwave.
Optimus defeats Shockwave and decodes his transmissions, discovering Starscream, Megatron's second-in-command, also knows of the AllSpark and Megatron's-whereabouts.
With their mission clear, the Autobots decide to rescue Bumblebee, Sam and Mikaela from Sector 7. Bumblebee, Sam and Mikaela are captured inside Hoover Dam.
A power outage allows Bumblebee to escape. While exploring Bumblebee finds the frozen Megatron and the All Spark.
Bumblebee recovers the AllSpark and rescues Sam and Mikaela, and then flee when Megatron awakens.
Starscream and Blackout, fly through the dam and cause several generations which allow Megatron to escape.