The Wall is a four storey tall pegboard, similar to a Pachinko game or Bean Machine; it also is similar to the Plinko board used for that pricing game of the same name on The Price is Right. The bottom of the board is divided into 15 slots marked with various pound sterling amounts, some of which increase as the game progresses. Seven numbered "drop zones" are centred at the top of the board (above the centre seven slots), from which balls can be dropped into play.

A team of two contestants plays each game, with a theoretical top prize of £687,495.[8][9] Green balls dropped on the board will add to the team's bank, while red balls dropped on the board will subtract from it. Throughout the game, the bank has a floor of £0.