A strange little side quest
A small trivia drop for Zombie Arena WebGL: Space Invaders arrived in 1978 and helped turn electronic games from an arcade curiosity into mainstream entertainment. That old idea kept changing rather than disappearing. The word 'checkmate' is linked to the Persian expression 'shah mat', used when the king was trapped. That is the kind of background detail that makes another attempt at Zombie Arena WebGL feel a bit more connected to the history of play.