Halo 4 and Black Ops II are out this month, causing us to reflect on the appeal of first-person shooters. I tend to dismiss them, as I’m not a fan of shooting things without understanding them, but there’s no denying the adrenaline rush from a competitive multiplayer win. Stephen Totilo at The New York Times explains how the feeling of surmounting a difficult challenge makes these games successful. The best experience involves cranking the difficulty to Heroic and engaging a set of enemies, trying new strategies repeatedly and scavenging weapons or equipment from the battlefield until the right solution is found,…