Geek Out! is basically a trivia game for all things nerd (comics, games, fantasy, science fiction, and more). To play all you do is roll a dice, and read the challange. Example, name three characters from The Walking Dead. At that point your opponents can start bidding up the number of answers you can give. You then have the choice to take on the highest bidder or make them prove their worth. Getting enough correct answers will net you one point, but fail to meet the challenge and you get negative 2 points. First one to five points wins.
One of the funnest things about this game is debating if a given answer was valid or not. I highly recommend this game for a small group, we played with 5 and it worked great. The box says you can play with as few as two… and at only $20 it is a steal compared to most games out there.