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