http://www.bladeinteractive.com/hydro.html

"The water in Hydrophobia is therefore an intrinsic gameplay mechanic. It can be dangerous; you could get caught in a torrent of churning debris, carried away by a freak wave or trapped in a flooding room. However, it can also be your allie, since you can learn to manipulate the flow by remotely opening doors, or smashing windows to release waves which can take out your enemies, solve puzzles or carry user-designed traps and devices to there explosive destination."

Pretty early, gameplay might be interesting.