Overdosing on saccharine-sweet and cutesy titles can be a bit of an occupational hazard when working in the iOS games biz, so thankfully Gameloft have cooked up an antidote in the shape of 9mm, a hard-R rated, adult-toned third-person shooter that blends Grand Theft Auto's gritty aesthetic with pulse-pounding slow-mo gunfights à la Max Payne.