Kodu Game Lab, originally named Boku, is a programming integrated development environment (IDE) by Microsoft's FUSE Labs. It runs on Xbox 360 and Microsoft Windows. It was released on the Xbox Live Marketplace on June 30, 2009. A Windows version is available to the general public for download from Microsoft's FUSE web portal. As of 2023, it still receives occasional updates.

Kodu is a visual programming tool which is used to teach basic coding principles with the use of blocks and pictures. Its design allows it to be accessible to anyone. Most of the creation takes place within the 3D environment, where programming is done through characters (sometimes referred to as "bots"). ^{[citation needed]}

Kodu is different from other game development or programming apps in several key ways:

Kodu Game Lab has been used as an educational learning tool in selected schools and learning centers. Games created in Kodu can be given a title, description, and any combination of built-in tags, as well as be shared online in the "Community" tab.

Kodu's programming model is simplified and can be navigated using a gaming controller or a combination of the keyboard and mouse. It does not use most "serious" programming conventions, including symbolic variables, branching, loops, number and string manipulation, subroutines, polymorphism, and so on. Kodu uses a logic-based system, making it simple to understand for beginners.

The simplicity is achieved by situating the programming task in a largely complete simulation environment. The user programs the behaviors of characters in the 3D world, and programs are expressed in a high-level, sensory paradigm consisting of a rule-based system or language, based on conditions and actions similarly to AgentSheets.

The typical "hello world" of Kodu is:

WHEN see apple DO move toward