So I have a confession to make. I've played liars dice more than a couple of times, but still had to read the entire tutorial in Lying Liar's Dice before I started playing. I could say, "Oh, it's been so long since I've played liars dice at the local bar." but you know that's not true. Blame it all on my roots? No, I think the beer is to blame.
Liar's dice is the oldest of all bar games, using nothing but a bunch of dice and a few people to play. The basic gameplay has each person with five dice which have been rolled so the numbers are all jumbled, and starts with one player who makes a bet. Let's say that there are four people playing in this game, so the player bets that there are a total of four 5's in play. Since he can only see his five dice, and he only has two 5's, he's betting that there are at least two other 5's in play. The next guy can either call the previous guy out (in which everyone shows their dice) or choose a bigger amount to bet (wither four 6's or 5+ of any value. If you get called out an lose, you lose a die; same if you incorrectly call a bluff. Like most dice games, the last one in liar's dice with dice wins.
What makes Lying Liar's Dice so great is that it presents the game in a way that it all makes sense, even for those who aren't drinking. It's not the prettiest interface ever, but once you get used to it, it's quite fun. In addition to the standard game, you can play Lying Liar's Dice in nine different variations with up to five computers (and/or hot seat people) playing at the same time.