Using a player’s smartphone camera and GPS signal, the game makes it seem as if wild Pokémon are cropping up on the streets of the real world. When walking around and exploring, players – or trainers as they are called in the game – are greeted with rustling bits of grass, which signal a Pokémon’s presence. Walking closer will trigger them to appear, and tapping on them will initiate a Pokébattle. With the optional augmented-reality turned on, it may look as if a Caterpie is peeking out from the grass just outside the front door, putting players right in the shoes of a Pokémon trainer.