Metal Gear Solid V: Ground Zeroes, the prologue for the upcoming Metal Gear Solid V: The Phantom Pain, is an action-adventure stealth game. It is part of a sub-series of prequels in the Metal Gear series, taking place after Metal Gear Solid: Peace Walker.
The game follows Big Boss' infiltration in American black site on Cuban soil called Camp Omega for the extraction of both Cipher agent Pacifica Ocean and Sandinista child soldier Ricardo "Chico" Valenciano Libre.
The game offers new methods of sneaking and traversal methods as well as choose in what order the story events take place by selecting missions in any order they like. The game was originally set to be released alongside The Phantom Pain but long development time resulted in director Hideo Kojima splitting the project in two parts so that players will get an early access to Metal Gear Solid V. Critical reception to the game has been generally positive with praise aimed towards its mechanics, voice-acting, story, and graphics, with criticism aimed towards its short length.
Source: Wikipedia, "Metal Gear Solid V: Ground Zeroes," available under the CC-BY-SA License.