Project Malmo
A platform for Artificial Intelligence experimentation on Minecraft
... is a sophisticated AI experimentation platform built on top of Minecraft, and designed to support fundamental research in artificial intelligence.
The Project Malmo platform consists of a mod for the Java version, and code that helps artificial intelligence agents sense and act within the Minecraft environment. The two components can run on Windows, Linux, or Mac OS, and researchers can program their agents in any programming language they’re comfortable with.