Lego Harry Potter: Years 1 – 4 - Playstation 3

Lego Harry Potter: Years 1–4 is a -themed developed by and published by . The game is based on the toy line and its storyline covers the first four books by and its film adaptations in the : , , , and .

The game is available on the , , , , , , , , , , and . The version of the game was released on 22 February 2011 by . The game was released for the on 21 October 2016, as part of the Lego Harry Potter Collection, which bundles the game with its sequel, , and was also released for the and on 30 October 2018. Other versions of the game were released on 29 June 2010 in North America, 25 June 2010 in Europe, and 30 June 2010 in Australia and New Zealand.

Lego Harry Potter's gameplay is similar to that of most previous Lego video 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.

Changes to the mechanics of previous games include 'Student in Peril' missions, which are a group of challenges to help a student, and Polyjuice Potion, which allows players to temporarily change one of the player's characters into any other mini-figure unlocked. A major change is to the hub system. Diagon Alley serves as a hub for purchasing unlockable extras, The Leaky Cauldron works as a hub for returning to previous levels, while Hogwarts acts as a constantly evolving massive hub with the unlockable characters found by picking up their hidden portraits.