Information on the series, including required TOTTs can be found here Bonus 2.
A Hidden Mesage
When Darren opened the old game box he expected the usual clatter of dominoes, but instead the pieces were already arranged on the table in two precise formations. No one else had been in the room.
The dominoes weren’t random either. Each tile had been chosen carefully, odd pairings, numbers that didn’t follow any normal sequence. It looked playful at first but the longer Darren stared, the more intentional it felt. As if the pieces were trying to say something.
The halves didn’t mirror each other, they couldn't have been placed for balance or symmetry. They were placed for meaning. Someone, or something had left Darren a clue to a puzzle.
The Puzzle:

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