Shacknews has a report piecing together the case suggesting that Irrational Games is working on a new installment in the X-COM series of UFO strategy games using the Unreal 3 engine. They found a reference to an X-COM game on a list of Irrational Credits in a (since edited) legal document, and point out that Take 2 Interactive is owner of both Irrational Games and the X-COM license.