Armageddon mode - Successfully complete the game to unlock Armageddon mode. In this mode, everything that is destroyed explodes.
Unlimited energy - Get 1,000 WiFi tokens. Alternately, get a 100% completion.
The Final showdown:- Easy completion - To complete this level you will face Starscream. Kick Starscream in the back five times. He will drop the AllSpark. Pick it up. Swing the AllSpark at him. You will suffer serious damage. You are Megatron and can fly through the city and destroy Starscream.
Float to top of level - Go to any level with any vehicle form. The ability to climb walls must be unlocked. Star Scream is recommended. Go to the boundary of any level that is formed by a wall that you can climb. Once you find one, climb to the top. Once you reach the top, you will fall. The instant that happens, keep tapping X while holding Up so that you stay at the top of the wall, but keep loosening your climbing grip. Eventually your Transformer will look like it is going to get on or over the wall. Once this happens, do not move the D-pad. Your Decepticon will slowly float to the top of the level boundary. From here you can move your view and look around, but moving your character will cause you to fall to the ground.
Full health and no wanted level - While in Free Play, press start, go to "vehicle form" then select "confirm". From here you can just press B to go back to the game. You will now have full health and any wanted level will be gone.
Funky Bus - Connect to the Allspark Wars server to unlock the Funky Bus.
Love Cruiser - Collect 250 WiFi Tokens to unlock the Love Cruiser.
Play as G1 Starscream - Go to any Target with a DS Download Station, and download the Transformers DS trailer to unlock G1 Starscream.
Police chopper bonuses - When you have the ability to scan helicopters, scan a police chopper. After you do that, select that chopper and turn it completely black. You will now be capable of the following options. Note: You must have at least twenty cars, jets, etc. for these to work.
Level 5, invisible to enemies
Invincible to street autobots, police cars, etc.
Level 80, can fly through mountains, intangible, and unlimited energy.
Psycho Cars - Collect 500 WiFi Tokens to unlock the Psycho Cars cheat. This cheat makes cars constantly hit you in Free Roam mode.
Stunt Car - Collect 750 WiFi Tokens to unlock the Stunt Car.
Scout - Collect 1,500 WiFi Tokens to unlock Scout.
Target Exclusive Character - Go to any Target that has a DS Download Station. Download the Transformers DS trailer, and you will automatically unlock G1 Starscream.