No Man's Sky

No Man's Sky's gameplay is built on four pillars — exploration, survival, combat, and trading. Players are free to perform within the entirety of a procedurally generated deterministic open universe, which includes over 18 quintillion planets, many with their own sets of flora and fauna. By exploring, players gain information about the planets that they can submit to the Atlas, a universal database that can be shared with other players of the game. Players get compensated in in-game currency every time new information is uploaded to The Atlas. Players also gain materials and blueprints to upgrade their character's equipment and purchase a variety of starships, allowing them to travel deeper into the center of the galaxy, survive on planets with hostile environments, interact in friendly or hostile manners with computer-controlled space-faring factions, or trade with other ships. Some activities, such as killing too many lifeforms or draining too many resources from planets, will draw the attention of patrolling robotic Sentinels that will attempt to kill the player character. (Source: Wikipedia)