Petrichor V

Petrichor V is the primary setting of Risk of Rain and its sequel, Risk of Rain 2.

A mysterious, uncharted world, which was first set upon by humanity when the UES Contact Light was asked to go towards the planet by an unknown individual. The violent sabotage and crash of the Contact Light, as well as the subsequent struggle of its surviving crew, serves as the basis of Risk of Rain 1.

Description
Petrichor V is a diverse world, with a wide array of environments ranging from deserts, tundras, fungal jungles, islands floating freely in the sky, and a hefty variety of otherworldly realms, ranging from outright hellish to dimensions beyond common understanding. It is orbited by its moon, which is where Commencement is located.

The fauna of the planet is as equally diverse, and yet near-totally united in their violent hostility towards the marooned crew of the Contact Light. It was no sort of territorial dispute or desire to scare them off - the monstrous denizens of the planet relentlessly pursued the human survivors. There were some who attempted to document the native life, observing peaceful and gentle creatures who would turn savagely violent upon seeing a human. The signal echoes from Rallypoint Delta - the closest thing to a human settlement - describe the futility of their attempts to regroup in the wake of the planet's wrathful inhabitants. By the time the UES Safe Travels responds to the Contact Light's distress call, it is unable to find any trace of surviving humans left on the planet.

Trivia

 * Petrichor is the name of the earthy smell produced by rain after a dry period.
 * In planetary naming convention, planets are designated by the name of their star followed by the latin number of their orbit's position in the star system, counted from the star outwards. Following this convention, Earth is named Sol III. Likewise, Petrichor V would be the fifth planet in the planetary system of the star Petrichor.
 * 'Petrichor V' was originally a name given to the planet by fans, based on a track of the same name from the Risk of Rain 2 Soundtrack. It has since been officially adopted as the canonical name.
 * Prior to this, the developers had used 'The Planet', for simplicity and ease of access during discussions.