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