Transformers (Glu)

Transformers by Glu is a mobile phone game produced in 2007 based on the live-action movie.

Plot
Optimus Prime was damaged and separated from the Autobots on his arrival on Earth and is now stranded in the Hoover Dam. Unable to risk their communications being detected detected, Bumblebee sends out a signal that reformats your sell phone to send and receive Cybertronian signals! Optimus Prime's systems are a bit scrambled, so you'll have to guide him through the dam- and beyond- until he recovers!

Mobile Tracker Units
Decepticon drones.