The biggest difficulty playing Natal? Having enough physical stamina to play for longer than four or five minutes at a time. The demo game forces you to jump, punch and kick almost non-stop for around a minute – we found even five rounds exhausting.
While parents may rejoice at the health benefits of such active play, it's difficult to imagine the stereotypical Halo player jumping off his Lay Z Boy to do jumping jacks. It's fun, but it's tiring both physically and mentally: the novelty wears off quickly enough due to the limited scope of the demo.