Here is the full list of all 30 Transformers: Devastation achievements worth 1,000 gamerscore.
Completed all chapters, earning the highest rank, on difficulty COMMANDER or greater.
In chapter 6, on difficulty COMMANDER or greater, defeated Soundwave without taking damage.
In chapter 7, on difficulty COMMANDER or greater, defeated Megatron without taking damage.
In chapter 6, on diff. COMMANDER or greater, defeated Soundwave without defeating any cassettes.
In chapter 5, on difficulty COMMANDER or greater, defeated Shockwave without taking damage.
In chapter 4, on difficulty COMMANDER or greater, defeated Menasor without taking damage.
In chapter 3, on difficulty COMMANDER or greater, defeated Blitzwing without taking damage.
In chapter 2, on difficulty COMMANDER or greater, destroyed the shielding without taking damage.
In chapter 1, on difficulty COMMANDER or greater, defeated Devastator without taking damage.
In chapter 1, on difficulty COMMANDER or greater, knocked Devastator into a building 3 times.
Performed 100 successful head shots.
Completed all Challenge Mode missions on any difficulty.
Completed half of all Challenge Mode missions on any difficulty.
After dodging, quickly countered with a ranged attack 100 times.
Completed all chapters on any difficulty using Grimlock.
Used parrying to catch the following from an enemy: a boulder, a missile, and both drill types.
After dodging, quickly countered with a melee attack 100 times.
Completed all chapters on any difficulty using Wheeljack.
Completed all chapters on any difficulty using Sideswipe.
Defeated 100 enemies with Vehicle/Dino Attacks.
Defeated 100 enemies with Rush Attacks.
Completed all chapters on any difficulty using Bumblebee.
Collected all collectible items.
Finished the lift battle in Chapter 2 without taking damage from Insecticons.
Completed all chapters on any difficulty.
Completed all chapters on any difficulty using Optimus Prime.
Collected half of all collectible items.
In chapter 4, defeated Motormaster while racing him.
Synthesized 10 weapons.
Used Focus 100 times.