Quad-Ominos is an old game variation on standard dominoes published by Pressman Toys International, which was first released in 1978.  It is currently out of production although you may find game sets on the second-hand market.

Each Quad-Omino set is made up of 125 individual tiles, and each moulded polystyrene plastic tile is square-shaped.  The cream or white tiles are about 1 inch square, with rounded corners, and about 1/4 inch thick.  Each tile is marked with four numbers (numerals, not spots) from 0 to 5 on each corner in either black or brown.  These numbers are normally raised, so it is possible to distinguish them by touch.  Backs of tiles are hollow, which makes them lighter than other domino sets.

There are 126 possible unique combinations of the numbers 0 to 5 when marked four times on the square tiles, but Quad-Dominoes omit a tile that would have been marked 0-2-4-5.

The game can be played by 2 to 12 players, by children (8+) and adults alike.  Game play is very similar to ordinary dominoes with players drawing and laying tiles with matching adjacent numbers.   Players score points for each domino they lay and there are bonuses for other game situations.  The first player to score a total of 800 points, wins the game.