Pokemon Go is a free-to-play, location-based augmented reality (AR) game. It grew to massive success at its July 2016 launch, reaching the #1 spot in app stores for both Android and iOS. The game did run in to issues early in its release due to the popularity of the app as it rolled out to more countries. The game's characters are based on the popular children TV series Pokemon. Other Pokemon games are available on Nintendo devices, like the Nintendo 3DS.
The aim of Pokemon Go puts the focus on your current location. By moving around in real-time, you are able to find nearby wild Pokemon that you can then capture. Special icons on the map show areas of interest for Pokemon Go players: PokeStops and gyms.
PokeStops allow you to gain items, such as potions, berries and PokeBalls. You can also get eggs that when incubated can hatch in to a Pokemon. Eggs need you to walk a certain distance to hatch, ranging from 1–10 kilometers (0.62–6.2 miles).
Pokemon Gyms are not like gyms from more traditional Pokemon games. Instead, you represent one of three teams - Valor, Mystic, and Instinct - which can then own the gym. While you have a Pokemon in your team's gym, it can earn rewards to make your Pokemon stronger. Defeating an opposing team gym's leader allows you to take over that gym for your team.
More features and new Pokemon are added in regular updates. Pokemon trading, player vs. player battles, and Pokemon Centers are currently in development. Niantic has not provided any specific dates on when these will be released.