My Ideas:

Me Grimlock Kick Butt!
Kill 100 normal Decepticons with Grimlock.

Emperor of Destruction
Kill 1000 Autobots

Head Off!
Decapitate 50 Decepticons

 

Directed by Michael Bay
Kill 150 enemies with explosives.

 

Convoy:
When meeting back up with Warpath, take down three Marauders; one with Metroplex, one with Vehicle Form weaponry, one with Robot Form weaponry

Dance, Sucker, Dance!:
In Jazz's level, kill an enemy with Vehicle Form weaponry, transform, kill another with Melee, and finally kill a third with your primary weapon

Fair Warning Boys, I'll Put a few dings in Ya:
In Cliffjumper's level, melee kill 25 enemies

Jolt, Electrify!:
Kill 50 enemies with the Techvolt

Try this, it's a GAS!:
Kill 50 enemies with the Glass Gas Cannon

Swiftness of Action is paramount:
Kill 50 enemies with the Pathblaster

Landmine Renovations:
Kill 50 enemies with the Chaos Rift Combustor

 

These Boots Were Made For Walking - Take your first step

Shoot For The Moon - Successfully jump

It's Gettin Hot In Here! - Fire your weapon

 

Survival of the Fittest
Beat Escalation on the hardest difficulty without dying.

You Got The Power!
Upgrade all of your weapons in escalation or campaign.

 

Useless without coffee
Get zero kills the first time you use Metroplex's missile salvo ability.

 

Beast Within: Execute 50 enemies as Grimlock in Dino Form

King of the Road: Kill a Decepticon vehicle via ramming it

 

That one should just be called "I'll Put a Few Dings In Ya"

 

How has no one thought of this yet?
Tyrannical!
Kill 50 downed Autobots.

 

"Ain't that a kick in the Lugnuts"
Perform a specific stealth attack as Starscream

 

Okay, so what about my other Trophy ideas? Are they any good?

 

But you do get, "Where's My Ducky?".

 

Bite the bullet
Get killed with a headshot in multiplayer or campaign

Stuck to your guns
Keep the same weapons throughout an entire mission with out changing them once

Jump the gun
Kill a total of 25 enemies when jumping

Lose ones "Frag"
Kill a total of 15 frag grenade kills in a multiplayer game

Make a BEE-line for it
Complete the toutorial level in under *insert suitable time here*

The BEE'S knees
Completing the toutorial level without loosing any life

and of we get to play as Swoop (which we prob won't)
At one fell SWOOP
Defeat 4 enemies in 10 seconds when playing as swoop

 

One problem you HAVE to loose health at one part of the level (running/dashing through flames)

 

Ah I forgot about that

How about : "not loosing any life due to gun fire and melee attacks" ?

Its the best I can do  

 

Sorry if I sounded a bit of a jerk  

 

Not at all  

 

FoC!!!!!: Complete all achievements/obtain all trophies