Project Spark is an free open world game creator which allows the player the create whatever his/her heart desires in a not so complicated way. It features easy terraforming, a "brains" programming language, and kinect compatibility.
The point of Project Spark is to create awesome games which can be played by the community, and the community can then take the same game and improve to create an even better product.
You can use the Kinect to create your own custom animations if you so wish, and there is also a voice-acting feature as well.
Here are some videos:
This shows the power of the Brains programming language:
The Beta is to be released in October so be sure to sign up at joinprojectspark.com
Other community sites which have more info include:
project-spark.org
projectsparkhub.com
www.reddit.com/r/projectsparkgame/
