Here is the full list of all 45 LEGO Marvel Super Heroes achievements worth 1,000 gamerscore.
Completed game 100% (Single Player)
Collected all Avengers characters in the game (Single Player)
Unlocked all animal-themed characters (Single Player)
Rescued Stan Lee from every peril (Single Player)
Unlocked all True Believers (Single Player)
Collected all traditionally heroic mutants (Single Player)
Collected Doc Ock, Sandman, Mysterio, Kraven the Hunter, Electro and Vulture (Single Player)
Collected 1,000,000,000 studs (Single Player)
Collected all traditionally evil mutants (Single Player)
Unlocked all the Guardians of the Galaxy (Single Player)
Collected Howard the Duck (Single Player)
Unlocked Black Cat (Single Player)
Collected all Iron Man armors (Single Player)
Completed House Party Protocol
Completed Level 15 - The Good, the Bad and the Hungry
Completed Level 14 - A Doom with a View
Completed Level 13 - Magnetic Personality
Completed Level 12 - Rapturous Rise
Completed Level 11 - Taking Liberties
Completed Level 10 - That Sinking Feeling
Completed Level 9 - Doctor in the House
Completed Level 8 - Juggernauts and Crosses
Completed Level 7 - Bifrosty Reception
Completed Level 6 - Red Head Detention
Completed Level 5 - Rebooted, Resuited
Performed all big LEGO figure transformations
Turned into Stan Hulk
Defeated 100 enemies as the Thing
Completed Level 4 - Rock up at the Lock up
Regenerated as Wolverine
Created a custom character
Created a character called “Trevor” in the character customizer
Read a comic in Deadpool's room on the Helicarrier
Played as Agent Coulson
Drove to the Baxter Building as Magneto in the Magneto Mobile
Performed Hulk's special move on Loki
Performed a special throwing move as Colossus on Wolverine
Teamed up Captain America with Human Torch (Co-op)
Destroyed 100 vehicles in the Manhattan hub
Completed Level 3 - Exploratory Laboratory
Completed Level 2 - Times Square Off
Turned Mister Fantastic into a teapot for the first time
Complete first Helicarrier skydive
Completed Level 1 - Sand Central Station
Transformed into the Hulk 50 times