In You Lying Sack, you want to be the last player in the game, with everyone else having been removed because they were terrible liars.

Each player begins the game with two "bad things", these bad things being made of foam. A sack is filled with many more bad things, along with one good thing made of hard rubber.

On a turn, roll the six-sided die, then put it on the "shrink your pile" space. Next, draw from the sack either the one good thing or as many bad things as indicated on the central display, which starts at 2 and increases to 8, resetting to 2 anytime a 6 is rolled on the die.

Whatever you draw, hold your clenched fist (or fists) out to the player on your left and say, "My hand is full of bad things. Will you take them?" If they decline, ask the next player. If everyone declines, then you get to keep any bad things in your hands; if you had the good thing, however, give away to other players as many bad things from your pile as the number shown on the die, then return the good thing to the sack.

If another player accepts your offer, they add the bad things to their pile or (if you held the good thing) they give you bad things from their pile equal to the number on the die, then return the good thing to the sack.

If you ever have at least ten bad things in your pile, you are eliminated from the game. When only one player remains, they win.