Here's a brief tour of the interactive game from Gelf Magazine that challenges you to determine what's news and what's satire.

Playing the Real Or Onion game is simple. We'll give you a headline - "Grandma Shuts Down Entire Country's Internet" for example - and you tell us where it's from: a real news source or the Onion.

Each real headline links back to the original source, along with a witty comment from our peanut gallery and stats about how many people got it right. The game sounds easy, but you'd be surprised how tough it can be. And with over hundreds of headlines, you can play for hours on end.

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