There's the sense, at times, that Prey is another jumble of exotic raw materials thrown into a Fabricator, a button's touch away from brilliance. But if the chemistry between powers, terrain variables and opponents may fall short of Arkane's best work, the setting's gravity and the charm of certain individual systems is enough to pull you through to the finish. The new Prey began life under a cloud - to be specific, the cloud kicked up by the demise of its Human Head predecessor - but in Talos 1, Arkane has fashioned one of the greatest virtual environments, as ornate and soggy with hubris as BioShock's Rapture, yet far more open-ended. And in the mercurial applications of Mimicking, recycling and the Gloo Gun, there are tantalising hints of something arcane indeed.