Character Select (Exploit)...
	Characters Statistics...
	Grimlock...
	Various Achievements...
	Wheeljack...

Whenever you reach an Ark transport spot, you can change the character you are controlling. If you need to make a switch elsewhere, though, there's a trick you can use if you don't mind losing a bit of progress. First, pause the game and return to the Main Menu. Then select Challenge Mode and choose a mission. Highlight the desired character, then back out to the main screen and now choose the Continue option to return to Story Mode. You'll resume play from the most recent checkpoint you cleared, but now you'll be controlling the character you highlighted while in the other mode.

Listed below are each of the characters along with their ratings and moves.

Bumblebee
Health: Low
Melee Attack: Low
Ranged Attack: High
Defense: Medium
Top Speed: Medium
Ability: Evasive Slide
Super Move: Bomb Barrage

Grimlock
Health: High
Melee Attack: High
Ranged Attack: Low
Defense: High
Top Speed: Medium
Ability: Dash Grab
Super Move: Flame Inferno

Optimus Prime
Health: High
Melee Attack: High
Ranged Attack: Medium
Defense: High
Top Speed: Medium
Ability: Trailer Swipe
Super Move: Power Slam

Sideswipe
Health: Medium
Melee Attack: Low
Ranged Attack: Medium
Defense: Medium
Top Speed: High
Ability: Rapid Dash
Super Move: Missile Barrage

Wheeljack
Health: Medium
Melee Attack: Medium
Ranged Attack: High
Defense: Low
Top Speed: Medium
Ability: Energy Shield
Super Move: Spread Bomb

Complete Chapter two.

Complete the following achievements to unlock Microsoft Gamerscore points.

Achievement	How to unlock
(Don't) Hit the Brakes! (15 points)	Defeat 100 enemies with Rush Attacks.
All Clear (85 points)	Complete all Challenge Mode missions on any difficulty.
Avid Collector (30 points)	Collect half of all collectible items.
Broken Radio (30 points)	In chapter 6, on difficulty COMMANDER or greater, defeat Soundwave without taking damage.
Bullet Storm (30 points)	After dodging, quickly counter with a ranged attack 100 times.
Catch this! (30 points)	Use parrying to catch the following from an enemy: a boulder, a missile, and both drill types.
Destruction Derby (30 points)	In chapter 4, on difficulty COMMANDER or greater, defeat Menasor without taking damage.
Don't Look Him in the Eye (30 points)	In chapter 5, on difficulty COMMANDER or greater, defeat Shockwave without taking damage.
Emperor of Destruction (30 points)	In chapter 7, on difficulty COMMANDER or greater, defeat Megatron without taking damage.
Flyswatter (30 points)	Finish the lift battle in Chapter 2 without taking damage from Insecticons.
Full Throttle (15 points)	Defeat 100 enemies with Vehicle/Dino Attacks.
HARD-Core (30 points)	In chapter 2, on difficulty COMMANDER or greater, destroy the shielding without taking damage.
Halfway There (30 points)	Complete half of all Challenge Mode missions on any difficulty.
Hawkeyed (15 points)	Perform 100 successful head shots.
No Stone Unturned (90 points)	Collect all collectible items.
Pedal to the Metal (30 points)	Use Focus 100 times.
Platinum (90 points)	Complete all chapters, earning the highest rank, on difficulty COMMANDER or greater.
Quick Reflexes (30 points)	After dodging, quickly counter with a melee attack 100 times.
Raging Bull (30 points)	Complete all chapters on any difficulty using Sideswipe.
Roadblock (30 points)	In chapter 4, defeat Motormaster while racing him.
Sting Like a Bee (30 points)	Complete all chapters on any difficulty using Bumblebee.
Supreme Commander (30 points)	Complete all chapters on any difficulty using Optimus Prime.
Surround Sound (30 points)	In chapter 6, on diff. COMMANDER or greater, defeat Soundwave without defeating any cassettes.
Synthesis 101 (15 points)	Synthesize 10 weapons.
The King (30 points)	Complete all chapters on any difficulty using Grimlock.
The Wizard of Iacon (30 points)	Complete all chapters on any difficulty using Wheeljack.
Till All Are One (30 points)	Complete all chapters on any difficulty.
Triple Changer (30 points)	In chapter 3, on difficulty COMMANDER or greater, defeat Blitzwing without taking damage.
Urban Landscaping (15 points)	In chapter 1, on difficulty COMMANDER or greater, knock Devastator into a building 3 times.
Wrecking Crew (30 points)	In chapter 1, on difficulty COMMANDER or greater, defeat Devastator without taking damage.

Complete Chapter one.