Father. IO

A REAL-WORLD FPS. Free, US$39 for attachment www.father.io

Father.IO is the world’s first multiplayer AR shooter that uses the world around you as the setting for a giant laser tag battle. The game uses GPS positioning and an infrared attachment for the back of a smartphone to determine where everyone is and who is shooting at whom, allowing you to play on teams of up to 16 or in 32-person death matches. This massively multiplayer AR Kickstarter already hit its funding goal more than six times over — and looks like it’ll conquer much more.