Which Lego game is based on the Marvel Cinematic Universe films?

The Lego game based on the Marvel Cinematic Universe films is Lego Marvel's Avengers. Released in 2016, it primarily adapts The Avengers and Avengers: Age of Ultron, while also drawing individual levels from Captain America: The First Avenger, Iron Man 3, Thor: The Dark World, and Captain America: The Winter Soldier.

Developed by Traveller's Tales and published by Warner Bros. Interactive Entertainment, the game follows the familiar Lego formula of platforming, puzzle-solving, combat, character switching, and collectible hunting. Its roster includes MCU versions of Iron Man, Captain America, Thor, Hulk, Black Widow, Hawkeye, Ultron, Loki, Vision, and many others.

A common mix-up is Lego Marvel Super Heroes, the earlier 2013 game. That title features Marvel characters but tells an original comic-book-inspired story rather than directly adapting the MCU films. Lego Marvel's Avengers also differs through its use of archival audio from the films, including movie dialogue and music. It was released across PlayStation, Xbox, Wii U, Nintendo 3DS, Windows, and OS X platforms.