Urban codes are physical markers or tags placed in urban space to map or define a game world - to appropriate laneways and other locations as 'readymade' sites for live games.
First and foremost, they are a form of abstract wayfinding that signifies the presence of an alternate reality. Each tagged location is transformed from a space to a place in game.
Over the past six year urban codes have been used in a number of different ways in public art and playable city projects - as collectible tokens with redeemable codes, as scannable QR codes, and as fiducial markers in augmented reality games.
In each instance they enable play in urban contexts.