Cardboard Warfare 2 Is The Epic Sequel to Heavy Duty Paper HellCasey Chan9/27/11 5:20pm19EditPromoteGo to permalink The original Cardboard Warfare? Three and a half minutes of pure paper kickass. Cardboard Warfare 2? Twenty-five minutes of beiged paper, boxed artillery, fly-like-paper planes, bizzaro world fun. It's the World War 2 to the original's World War I.