Quad Vex is the TetraVex game, which is an edge-matching puzzle. The player is presented with a grid (3x3, 4x4, 5x5, 6x6) and a set of square tiles, each with a number on each edge. The objective of the game is to place the tiles in the grid in the proper position as fast as possible. Two tiles can only be placed next to each other if the numbers on adjacent faces match.