What is "wall game"

n. A game similar to association football and rugby union that originated from and is still played at (w: Eton College).

Wall game can refer to different games

• Eton wall game, famously played only at Eton
• The Wall Game, a UK children's game show on ITV during the 1980s
• Any game that redefines a wall as part of the board that the game is played on, for example Escape from Colditz