The game requires two players, and you need to print out the Bomb Defusal Manual. One player looks at the screen and describes the bomb to the second player who looks through the manual to figure out what is needed to defuse the bomb. It has a time limit and will explode if you make too many mistakes.
This game looks like a ton of fun. Watch Rich and Jack play it a bit (you can just skip ahead to around 7:30 in the video to see the gameplay.
http://www.keeptalkinggame.com/
http://www.bombmanual.com/
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Saw this at PAX, and it looked really cool. Good idea for a Roundtable game!