LittleBigPlanet (sometimes referred to as LittleBigPlanet PSP to differentiate it from the PlayStation 3 game of the same name) is a puzzle-platform game for the PlayStation Portable developed by SCE Studio Cambridge in conjunction with Media Molecule and published by Sony Computer Entertainment. An addition to the LittleBigPlanet franchise made for the PSP, featuring a brand new story mode. It was released on 17 November 2009 in North America and 20 November 2009 in PAL regions. The game's servers have been shut down since July 30, 2016.

The game's gameplay is the same as the original PlayStation 3 version, albeit without the co-operative multiplayer aspect and one of the 'layers' in which the level 'set' is created within. The PlayStation 3 version has three 'thick' layers and four 'thin' layers, however LittleBigPlanet PSP only has two 'thick' layers and three 'thin' layers. The game features an all new campaign with brand new levels, and consists of an introduction, 23 main levels, and 14 mini levels, 2 of which are "Mini Games". These levels were created by SCE Studio Cambridge, and are based around seven different themes that draw inspiration from real-world locations including Chinese gardens, dry Australian deserts and icy Alpine stages.[4] Players must traverse complicated mazes during levels using devices including switches, rotating platforms and floating lanterns that can be ridden or grabbed. The main objective of each level is to move from one side of the stage to the other, dodging deadly contraptions such as electric snakes shooting out and trying to kill your sackperson. The game also features user-generated content similar to the PlayStation 3 original.

The game's overall goal is to capture prize bubbles which include stickers, costumes, materials, and objects players may use to customize their own Sackboy and levels. Players can create their own levels from a blank slate or template using various items gained in the game and items ready-made by the game's developers. These levels can be uploaded to the game's online servers to be shared among the community.