Full list of all 70 LEGO MARVEL's Avengers achievements. It takes around 35-40 hours to unlock all of the achievements in the base game on Windows.
The base game contains 40 achievements, and there are 6 DLC packs containing 30 achievements.
Drive Lola as Agent Coulson
Play as Fandral, Hogun and Volstagg in one sitting
Play as Harley Keener and Tony Stark in any level other than level 9
Create and play as a Custom Character equipped with Mjolnir
Create a Custom Character
Stop 10 random crimes in Manhattan during a single session
Visit all Hub locations
Play as Vision - both playable characters
Team-up Nick Fury and Quicksilver
Play as any version of Falcon and as any version of Cap, while in Washington D.C.
Complete 'Ultron Undone'
Complete 'Rise of Ultron'
Complete 'Korea Prospects'
Complete 'Anger Management'
Complete 'Lost in the Aether'
Complete 'No Strings On Me'
Complete 'Ready A.I.M. Fire'
Complete 'Lack of Insight'
Playing as Coulson: die and respawn
Complete 'Earth's Mightiest'
Complete 'Avengers Assemble'
Transform from Banner to Hulk
Complete 'Helicarrier Havoc'
Complete 'Shakespeare in the Park'
Complete 'Rail Hydra'
Complete 'A Loki Entrance'
Complete 'Struck Off the List'
Achieve True Avenger in any level
Witness the 100% Stud Fountain inside Avengers Tower
Transform from Lou Ferrigno to Hulk (Lou Ferrigno)
Play as every Iron Man variant in one session
Play as: Hawkeye (Kate Bishop), Hulkling, Wiccan, America Chavez and Speed in the same session
Playing as Aldrich Killian: die and respawn
Grow Ant-Man, Black Goliath, and Fin Fang Foom in one sitting
Transform into Stan Lee (Hulkbuster)
Play as Captain Britain, Union Jack, Spitfire, Agent Carter and Mandarin (Trevor Slattery)
Play as Moon Knight, Moondragon, Moon Boy in one session
Play as Iron Fist, Daredevil, Jewel (Jessica Jones) and Luke Cage
Unlock and view all 15 Minikit Comic Pages
Turn on all Red Brick Extras at the same time
Find a way to freeze Doctor Voodoo during Free Play in any area of the game
Set both Free Play characters as Baron Mordo and Dormammu
Complete the 'All-New All-Different Doctor Strange' level
Complete the 'All-New All-Different Doctor Strange' level after achieving True Avenger status
Complete the 'All-New All-Different Doctor Strange' level with all Minikits unlocked
Defeat 20 enemies as the Black Knight (Dane Whitman) during Free Play
Set both Free Play characters as the Enchantress and Executioner in the Asgard hub area
Complete the 'The Masters of Evil' level
Complete the 'The Masters of Evil' level after achieving True Avenger status
Complete the 'The Masters of Evil' level with all Minikits unlocked
Fly the Captain Marvel Skycycle as Captain Marvel in the Manhattan hub
Complete the 'Classic Captain Marvel' level
Complete the 'Classic Captain Marvel' level after achieving True Avenger status
Complete the 'Classic Captain Marvel' level with all Minikits unlocked
Set both Free Play characters as Tic and Hawkeye (Classic)
Complete the 'MARVEL's Agents of S.H.I.E.L.D.' level with all Minikits unlocked
Complete the 'MARVEL's Agents of S.H.I.E.L.D.' level after achieving True Avenger status
Fly ''The Bus'' vehicle as Agent Melinda May
Set both Free Play characters as Agent Leo Fitz and Agent Jemma Simmons
Complete the 'MARVEL's Agents of S.H.I.E.L.D.' level
Complete any race in the HUB using the Black Panther Skycycle
Defeat 20 enemies as Killmonger in the 'Classic Black Panther' level during Free Play
Complete the 'Classic Black Panther' level
Complete the 'Classic Black Panther' level after achieving True Avenger status
Complete the 'Classic Black Panther' level with all Minikits unlocked
Set both Free Play characters as Ant-Man (Hank Pym) and The Wasp (Janet van Dyne)
Ride Ant-Thony as Ant-Man (Scott Lang)
Complete the 'Ant-Man' level
Complete the 'Ant-Man' level after achieving True Avenger status
Complete the 'Ant-Man' level with all Minikits unlocked