Eidos Montreal outsourced Deus Ex: Human Revolution's controversial boss battles to Grip Entertainment, whose president Paul Kruszewski admits in a behind-the-scenes video that he came into the project with no prior experience of the series. "Full confession: I'm a shooter guy," he says. "I was coming into this not knowing a lot about the Deus Ex world. The guys at Eidos gave us the design, gave us the engine…and we gave them back that experience." Many players will agree with Kruszewski's admission that bosses were a tough balancing act given the freedom afforded by the game's augmentation system - "Balancing that was brutally hard," he says - but may disagree with his claim that Grip succeeded. "I've been building technology for 20 years," he says, "and it's one of the cleanest, best pieces of technology I've ever built."