No Man's Sky is a procedurally generated science fiction game. Featuring planetary exploration, deep oceans, space-based battles, 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.
As No Mans Sky is generated procedurally, it relies heavily on computer hardware to quickly create the game experience for the player. The sort of PC required to meet recommended NM:Sky specs while still achieving a reliable frame per second at 1080p would be an i7-980 2.8GHz processor or possibly an AMD FX-8120. The more powerful the processor the smoother the experience with this type of spontaneously generated game. RAM will likely play a significant part and at least 8GB RAM will be needed for No Mans Sky when you are swooping down across the landscape of a planet that is being built in front of your very eyes. Finally an Nvidia GTX 480 is the minimum graphics hardware or an AMD HD 6970, but I suggest looking for more powerful. Perhaps a R9 285 or GTX 960.