In my 2007 book Persuasive Games, i discuss a wonderful advergame for the Britvic pacer-drink J2O. The game challenged the player to pee accurately into a toilet after drinking pint after pint of beer. The advertised product, a sort of fancy sugar water, helped with recovery in the same way . I don't think the game's online anymore, but you can read about it in this old press release.

Well, now there's a version of a similar concept for iPhone: Drunk Sniper. Same type of gameplay, but now you can play in the toilet stall too. Available now for 99¢ in the App Store.