[[caption-width-right:350:One of the many vistas from ''Noctis IV''.]]
''Noctis'' is an open-source space exploration game released in 2000. You play as a Felysian, a cat like sentient species in a Stardrifter, a speedy space ship. The gameplay is mainly exploring the reaches of the universe.

!!'''{{Noctis}}''' provides examples of:
* AllThereInTheManual: Various world building details surronding the game's backstory can be found within the game manual.
* BeautifulVoid: Contains 70 billion stars, all procedurally generated. Precious few have life, and your character is the only sentient being. (The website says that there are other exploration ships around, but it's "fantastically unlikely" that you'll ever meet one. For game purposes, you're the only person in the galaxy.) There's no win condition, and no way of losing except against existentialist angst—just exploration, and wonder at the sheer emptiness of it all.
** The only time you will see another ship is if you run out of fuel and activate the emergency distress beacon. Another Felysian ship will appear shortly and give you a few grams of fuel to get you on your way, then depart.
* LongLived: The Felysians as a whole straddle the line between this and TimeAbyss. Their lifespans range anywhere from 3100 to 4500 years.
* MohsScaleOfScienceFictionHardness: The game ranks in at PhysicsPlus. While there are a few categories of stellar bodies with no real life counterparts effort is still made to explain them within the context of the game universe's laws of physics.
* ProceduralGeneration: You explore a galaxy approximately 90 thousand light-years in radius (about double the radius of the Milky Way Galaxy) made of over ''78 billion'' stars, many with planets and moons. If you pick any point in the starfield, you can go there, then land on any rocky planet you find and roam around. All created by a program of under a megabyte.
* WideOpenSandbox: In fact, there is nothing to do but explore.
* {{Vaporware}}: Noctis V has been announced, but there has been no sign of development.