Invader (born 1969) is a street artist who pastes up characters from and inspired by the Space Invaders game, made up of small coloured square tiles that form a mosaic. He does this in cities across the world, then documents this as an "Invasion", with maps of where to find each invader.
He started this project in 1998 with the invasion of Paris - the city where he lives and the most invaded city to date.
The mosaics depict characters from Space Invaders and other video games from the late 1970s. The images in these games were made with fairly low-resolution graphics, and are therefore suitable for reproduction as mosaics, with tiles representing the pixels. The tiles are difficult to alter and weather-resistant.