Due out in 2012, this is the first project being worked on by Portal co-creator Kim Swift, who left Valve for Airtight back in 2009. As seen on GameSpot, Quantum Conundrum is a first-person puzzle/platformer starring a 12-year old girl who must rescue her uncle, Professor Q, who managed to get himself trapped in another dimension.
Players will complete puzzles by shifting between dimensions to move objects and progress. Dimensions have different properties, such as the "fluffy dimension," making objects easier to lift and move.
For more on Quantum Conundrum, head over to GameSpot.