The PixelJunk Shooter [official site] games are home to my favourite fluid simulation systems. In a time when digital boxes, barrels and bodies drop, flop and break in fascinating and convincing fashion, liquids are still depicted as still, glassy surfaces far too often. The two Shooter games – collected together in the new Ultimate release which marks the sequel’s first appearance on PC – are 2D arcade/puzzle games that combine the physics of Thrust with superbly realised lava, water, oil and acid.