Lego Harry Potter: Years 1–4

Lego Harry Potter: Years 1–4
Cover art for Lego Harry Potter: Years 1–4
Developer(s)	Traveller's Tales TT Fusion (mobile/handheld)
Publisher(s)	Warner Bros. Interactive Entertainment Feral Interactive (OS X)
Series	Lego Harry Potter
Platform(s)	iOS OS X Microsoft Windows Nintendo DS Wii PlayStation 3 PlayStation 4 PlayStation Portable Xbox 360
Release date(s)	NA: 29 June 2010 EU: 25 June 2010 AU: 30 June 2010 OS X WW: 22 February 2011 PlayStation 4 WW: October 21, 2016
Genre(s)	Action-adventure
Mode(s)	Single-player, multiplayer

Lego Harry Potter: Years 1–4 is a Lego-themed action-adventure video game developed by Traveller's Tales and published by Warner Bros. The game is based on the Lego Harry Potter line and its storyline covers the first four films in the Harry Potter series: Harry Potter and the Sorcerer's Stone, Harry Potter and the Chamber of Secrets, Harry Potter and the Prisoner of Azkaban, and Harry Potter and the Goblet of Fire. The game is available on the Wii, Xbox 360, PlayStation 3, Nintendo DS, PlayStation Portable, Microsoft Windows, OS X and iOS. The OS X version of the game was released on 22 February 2011 by Feral Interactive. The game was released for the PlayStation 4 on October 21, 2016, as part of the Lego Harry Potter Collection, which bundles the game with its sequel, Lego Harry Potter: Years 5–7.

Lego Harry Potter's gameplay is similar to that of most previous Lego games, with an emphasis on collecting, exploring, and solving puzzles. Casting spells is an integral part of the gameplay, with a wide range of spells available for unlocking as the player progresses. As there are many spells available in the game, the player can use the spell wheel to select the spell. Potion-making is another integral feature; potions can help the player complete levels or, if created incorrectly, have adverse side effects such as turning the player into a frog.