Be warned: Paris, along with many other cities, is being taken over by 8-bit aliens! Actually it's just the work of a French artist known as Invader and his collection, the Space Invaders mosaic. He started back in 1998 with Paris and since then has moved on to tag multiple urban areas with well known video game icons.
The locations chosen for the Space Invaders mosaic are not done at random; in fact, they contain a specific order and plan. In Montpellier, for instance, the artist planned out many different locations for his pieces so that when you look at a map, the points take the form of a giant Space Invader character.