Abzû is an adventure video game developed by Giant Squid Studios and published by 505 Games for PlayStation 4, Xbox One, Nintendo Switch and Microsoft Windows. Initially released as a digital title in August 2016, a retail version for consoles was released in January 2017. Following the journey of a diver exploring the ocean and restoring life using magical springs, the gameplay allows the player to freely navigate underwater environments ranging from open water and natural caverns to ancient ruins. Development lasted three years, involving a team of thirteen people. Several members, including director Matt Nava and composer Austin Wintory, had previously worked on the 2012 video game Journey—the ocean setting of Abzû was both a reaction to the desert setting of Journey and inspired by Nava's love of scuba diving. The setting and story drew from Sumerian mythology and the cosmic ocean myth. Reaching high positions in sales charts, Abzû was praised by journalists: the majority of praise went to its art style, with some critics comparing it to Journey. In Abzû, the player takes on the role of a diver in a vast ocean—after waking up floating on the ocean's surface, the diver begins exploring the surrounding underwater environments filled with plant and animal life, in addition to uncovering ancient technology and submerged ruins. In a few areas, the diver is also able to explore land-based environments above the water. As the game progresses, the diver unlocks new areas and pursues the secrets behind the forces harming the local environment. The diver's course through the game follows a linear path through interconnected areas filled with marine life. The player directs the diver through the environments using full analogue control, able to interact with the environment to solve switch or item-based puzzles, and sit on pedestals within each area to observe the surrounding sea life. The diver can accelerate, and interact with marine life using sonar chimes. The diver can grab onto the bodies of larger marine animals and ride on them. Each area sports hidden collectables for the diver to find.