As well as 6-6 standard sets, dominoes are sold in 9-9 sets. The highest domino in the 9-9 set is the 9-9 tile.
As the picture below shows, the 9-9 set has 55 tiles. 10 are doublets and 45 are singlets. The 9-9 set is a superset of the standard 6-6 set. The last three rows in the diagram below shows the 27 tiles the 9-9 set adds to the 6-6 set.
To create the 8-8 set required by The Big Game, simply remove the tiles from the 9-9 set that have 9's on their faces. Thus you remove the 10 tiles in the bottom-most row in this picture. The result is the 45-tile 8-8 set used in The Big Game.
A 9-9 Set of Dominoes . . .