Full list of all 51 Transformers: Revenge of the Fallen achievements worth 1,250 gamerscore.
The base game contains 41 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 10 achievements worth 250 Gamerscore.
Unlock all Autobot Unlockables
Viral - Kill someone with Viral Achievement, then taunt them in a RANKED or PLAYER MATCH game
Win a Match as Each of the 15 Default Characters
Win a Control Point round without losing a control point in a RANKED/PLAYER MATCH game
Host one game of each game type in a PLAYER MATCH game
While playing One Shall Stand, as the leader, kill the opposing leader in a RANKED/PLAYER MATCH game
Win one RANKED/PLAYER MATCH game as Autobots and one as Decepticons
Earn Platinum Medals on ALL Decepticon Missions
Eliminate 350 Autobots - Decepticon Campaign
Unlock all Decepticon Unlockables
Acquire 3,000,000 Energon in the Decepticon Campaign
Purchase All Decepticon Upgrades
Medal in all Decepticon Cairo Missions
Defeat The Fallen as Megatron - Decepticon Campaign
Medal in all Decepticon East Coast Missions
Defeat Optimus Prime - Decepticon Campaign
Medal in all Decepticon Deep Six Missions
Medal in all Decepticon West Coast Missions
Medal in all Decepticon Shanghai Missions
Earn Platinum Medals on ALL Autobot Missions
Purchase All Autobot Upgrades
Acquire 2,000,000 Energon in the Autobot Campaign
Make it into the Top 1000 on SP Leaderboards - Either Campaign
Medal in all Autobot Cairo Missions
Defeat The Fallen as Optimus
Defeat Megatron - Autobot Campaign
Medal in all Autobot East Coast Missions
Medal in all Autobot Deep Six Missions
Medal in all Autobot Shanghai Missions
Eliminate 250 Decepticons - Autobot Campaign
Medal in all Autobot West Coast Missions
Make it into the Top 10000 on SP Leaderboards - Either Campaign
Earn a Platinum Medal - Either Campaign
Unlock a Single Unlockable - Either Campaign
Earn a Bronze Medal - Either Campaign
Earn a Gold Medal - Either Campaign
Make it into the Top 100000 on SP Leaderboards - Either Campaign
Purchase an Upgrade - Either Campaign
Unlock a New Zone - Either Campaign
Earn a Silver Medal - Either Campaign
Fill OVERDRIVE Meter - Either Campaign
Complete the Decepticon campaign on expert with a 75% completion
Complete the Autobot campaign on expert with a 75% completion
Defeat G1 Megatron with G1 Starscream (MP only)
Win a match on ANY game mode on each new map. (3 maps)
Soundwave defeats Long Haul (MP only)
Win a match as each new character
Defeat G1 Optimus using G1 Megatron (MP only)
Defeat Megatron with Jazz using melee (MP only)
Sideswipe defeats Sideways (MP only)
Defeat G1 Megatron using G1 Optimus (MP only)