In Death Cube, you are trying not to be crushed by blocks — or to crush people with blocks — depending on your role that turn. The game takes place in a 4x5 grid that bears the numbers 1-20. Each turn, five spaces are covered on this grid based on whichever of the forty puzzle cards is chosen at random. If you are the "organizer", you are then presented with two pentominoes — i.e., five connected cubes — from a set of five pentominoes, and you have 24 seconds in which to decide how to fit these two pentominoes into the remaining 15 spaces of the grid. (The two are chosen at random from four possible choices, which means the game includes 160 total puzzles.) If you're not the organizer, then you are a "participant", and you want to find a safe square among those 15 spaces where you will not be crushed by a block. Some squares will definitely be safe based on the pentominoes in the challenge, whereas other squares will be safe only depending on how the organizer decides to place the blocks. When you've made your choice, grab the numbered tile matching your chosen space so that no one else can take it.