Now, duck duck goose is a local game, there is no online co-op to my knowledge. Which means you have a very obvious advantage here, simply distract your opponent, then while they're focused on the game proceed to initiate your attack. A grab here could work very well and if you could throw them around it might be even better! not in game of course oh no you've gotta do this in real life, hopefully with enough thrashing you can then beat them in game!