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