Keep Talking and Nobody Explodes is my kind of party game. What I mean by that is it's insanely complex (for one of the players) and is completely impossible to play properly at parties. On another note, I hate parties.
Here's a short vid of Cory and I trying to defuse a bomb. Keep in mind that we've had nearly six years of creative cooperation to refine our teamwork and communication skills. Your results may not be so magnificent.