Indie puzzle-platformer Vessel released last month to massive critical acclaim. It's one of the most cerebral, most competent - and best value - puzzle games we've played since the original Portal, and we lavished it with steaming dollops of deserved praise in our 9/10 review.
In order to give players an insight into the development process behind the sensational fluid physics and modelling, Strange Loop Games have proffered some prototype tech videos that show off the liquid physics engine deftly handling surface tension, viscosity and pressure. Definitely something to enjoy while you're buying and downloading it.
Check out the Vessel devblog for commentary.