This is the trophy list for the up and coming, however no official release date as of yet, for Transformers 2.

BRONZE
Quest for Survival
Win a on each new map.

Ultimate Weapon
Defeat G1 Megatron using G1 Optimus (MP Only)

Prime Target
Defeat G1 Optimus using G1 Megatron (MP Only)

Jazz Hands
Kill Movie Megatron with Movie Jazz using melee (MP Only)

Soundwave Superior
Soundwave defeats Long Haul (MP Only)

Sideswiped
Sideswiped defeats Sideways (MP Only)

Everyone has a weakness
Defeat G1 Megatron with G1 Starscream (MP Only)

SILVER

The Autobot Run
Complete the Autobot Campaign on expert with a 75% completion

Megatrons Massive Plan
Complete the Decepticon Campaign on expert with a 75% completion

(And there is one hidden trophy I am unaware of.)