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