No Man's Sky
No Man's Sky is a procedurally generated open universe game. Players take the role of a planetary explorer with a spacecraft, allowing them to explore the surface of numerous planets and interact with the flora and fauna, and take to space, engaging in combat with hostile forces and travel to other worlds. Planets and other features of this universe are procedurally generated; though initially built based on a 32-bit number processor, the final game will use a 64-bit seeding key, with the developers stating that this allows for more than 18 quintillion possible planets. The game will have online features that allow players to share details of planets they have visited with other online players, and will allow players to visit these planets through a large galactic map once they have upgraded their ship for hyperdrive capabilities. In August 2014, the developers confirmed that the game would be playable offline.
The game will feature planetary exploration, deep oceans, space-based battles, resource gathering, and potential predators on the various procedurally-generated worlds. Each world has its own ecosystem with potentially unforgiving conditions, such as desert worlds with large carnivorous worms. Players are initially given an uncharted universe to explore, where information about any planet's characteristics and lifeforms may be shared and updated with others through "The Atlas", an intergalactic database that is accessed through Beacons that can be found on the planets. The player's character can die from numerous means, including via encounters with dangerous creature, in space battles, or by Sentinels that patrol the planets and turn against explorers that drain a planet of too many of its resources or kill off too many of its flora or fauna; while the character will respawn after death, they will lose all information that they have collected but not yet uploaded to the Atlas. The game includes a crafting system, using resources and blueprints to construct new tools, weapons, and ships, all which can also be updated over the course of the game.
No Man's Sky does have a larger goal, to reach the center of the galaxy, driven by the availability of resources to the player, which improve as the player moves towards the center of the galaxy. Players need to collect, sell, and trade resources to acquire better ships and more fuel that lets them explore the more-centralized areas of the galaxy. Hello Games' co-founder Sean Murray stated that a player could reach the center of the galaxy with between forty to one hundred hours of gameplay without focusing on any additional exploration, but will hope players instead find themselves involved in other activities enabled by the open nature of the game, such as managing a trade route or studying all the possible flora in the universe.