From day one of its existence, Amplitude Studios has included the community in its game development cycle as something more than a marketing target. We have now shipped three games -- including the 2013 Unity Award winner -- with the community involved in design, development priorities, and release plans. This talk will present the Amplitude style of Open Development, focusing on how and why we do it the way we do and what choices we made along the way. Positive and negative lessons will be included.