Here is the full list of all 58 Marvel: Ultimate Alliance 2 achievements.
Defeat all Act III missions on Legendary Difficulty.
Earn all Trivia rewards.
Defeat all Act II and III missions as an Anti-Registration team.
Defeat all Act II missions on Legendary Difficulty.
Fight back an ambush.
Collect 200 Team Boosts.
Stop a convoy.
Rescue a hideout.
Defeat all Act I missions on Legendary Difficulty.
Complete all combat mastery goals listed on the Stats page.
Complete 24 maps in Co-Op.
Complete 8 maps in Co-Op.
Defeat 75 foes in "Balance"
Perform all Fusions by combining every available pairing of 24 heroes.
Defeat 12 mission bosses on Super Heroic or Legendary Difficulty without revival or map reload.
Finish what you started.
Defeat all Act II and III missions as a Pro-Registration team.
Collect 30 Audio Logs.
Unlock 23 alternate costumes.
Collect 10 Concept Art Bundles in HQ maps.
Free a country.
Complete all optional mission objectives.
Defeat 25 maps on Super Heroic or Legendary Difficulty without revival or map reload.
Perform 10 Fusions with another player-controlled hero in a Co-Op game.
Earn Mission Succeeded on a Simulator Mission in Co-Op and return to the Simulator menu.
Break and enter.
Complete a map in Co-Op.
Collect 125 Dossiers.
Collect 125 Team Boosts.
Earn 12 Gold Medals from Simulator Missions.
Earn 20 high scores for each type of Fusion: Targeted, Guided, and Clearing.
Repay a favour.
Ambush your opponents.
Defend a convoy.
Earn 8 Silver Medals from Simulator Missions.
Progress through "Insidious Alliance without breaking any Health Containers"
Complete "Escort Duty" without destroying any turrets.
Complete "Escort Duty" without disabling any floor hazards.
Complete "Insidious Alliance" with all four heroes alive.
Defeat 2 foes within 10 seconds in "Insidious Alliance."
Earn 4 Bronze Medals from Simulator Missions.
Throw all the proximity mines in "Balance".
Perform 10 revivals.
Defeat "Overload" with the X-Men.
Complete all Power training goals on the Stats page.
Raid a hideout.
Collect 50 Team Boosts.
Choose a side.
Defend your leaders.
Have 10 special conversations between characters with a history while in an HQ map.
Protect a city.
Score 30 Trivia Fusions.
Correctly answer 15 Trivia questions.
Crash a castle.
Complete all melee training goals listed on the Stats page.
You or other players on your team must destroy 250 health containers.
Perform all 5 recommended training Fusions in Latveria.
Topple a dictator.