"I'm in a behind-closed-doors presentation of a mission from Mirror's Edge Catalyst, and I've already lost count of how many times the word "fluidity" has been said. The movement? Fluid. The combat? Fluid. The mission structure? Fluid. The way the engine can now seamlessly transition from the outside world into a building's interior? Yup, also fluid. It's subtle hints like this that convey DICE's intent for their game."