Oreon Campaign Setting

A system-agnostic RPG campaign setting for a far away middle-fantasy world with a unique magic system.

Solar System

The central star, 'Alial', is a 4.8Gyr old class G5 star in the Milky Way galaxy.

The first planet, 'Seron', is a metal-rich barren planet of 0.08 earth masses at 0.6AU.

The second planet, 'Oreon', is a life-filled planet of 0.8 earth masses at 0.8AU. Its atmosphere is composed of 73% nitrogen, 25% oxygen, and 2% water vapor and trace gases. It has two moons, 'Er' and 'Et', in a 3:1 orbital resonance. Oreon has a thin ring system composed of water ice.

Inbetween the second and third planet is a metal-ice asteroid belt.

The third planet, 'Melon', is a cold, icy planet with a thin nitrogen atmosphere. It weighs 1.2 earth masses and orbits at 2AU. With a warm coat and a source of oxygen it would be possible to walk on its surface.

The fourth planet, 'Apoleon', is a small rocky planet with no atmosphere. It weighs 0.2 earth masses and orbits at 4AU.


Magic on the world of Oreon is probability manipulation. All living creatures have this ability, though only those with intelligence can understand how to use it at will. The strength of the probability manipulation comes with practice.

Most who learn magic start out with small tricks like influencing leaves to fall from a tree or influencing someone to miss a step and trip. A small minority learn to use this ability at a young age and get a head-start in training their magic ability.

Those who are highly trained can perform amazing feats such as teleporting, summoning things into existence, and even time travel. Magicians of this level are astronomically rare and are often recorded as being incarnate gods.

Peoples of Oreon

The peoples of Oreon arose from various species convergently evolving higher intelligence to survive the aftermath of a global extinction event in the distant past. Some have relatively recent common ancestors, while others do not.


Asean are very diverse and adaptable. Almost any task can be fulfilled by an Asean.

Their typical heights and weights range between 1.5-2.2m and 50-130kg. Their skin tones vary between different shades of brown, olive, or pink.

Outside of cities, they often live in tile-roofed brick houses.


Eridian are stocky and tough. Their shouts are said to be heard clearly from up to a kilometer away.

Their typical heights and weights range between 0.7-1.5m and 70-100kg. Their skin tone is typically a neutral beige.

Outside of cities, they often live in log huts.


Ilomiran have flat paddle-shaped hands and feet they use to swim. Living predominantly in water, they don't walk on land with much speed or grace.

Their typical heights and weights range between 1.0-1.6m and 40-70kg. Their skin tone is typically a pale gray.

They often live in small coastal settlements.


Aurelian are tall, robustly built, and bear a small resemblance to the Monitor lizards of Earth. When outside of Aurelian settlements, they are often seen with hired translators. For most Aurelian, many languages are difficult to speak due to the anatomy of their mouths.

Their typical heights and weights range between 2.1-2.7m and 100-170kg. Their skin tone is typically a shade of buff.

They often live in warm climates in predominantly Aurelian towns.


Their typical heights and weights range between 0.3-0.6m and 15-35kg. Their skin tones vary between shades of green, yellow, brown and dark blue.

They often live in forests or outside towns. They are sometimes ostracised for the myth that they play deadly pranks or curse food.

Common and Notable Plants of Oreon

Water Apple

Water apples are a browny-green, slimy-skinned fruit that grows on vines near quiet streams and lake shores. Water apple is a common side dish with seafood. The squishy flesh is sour.

Canvas Tree

The canvas tree is so named for its fibrous bark that can be woven into cheap textiles and rope. It has oval-shaped leaves and pale wood.


The needlenut tree is a short evergreen that bears edible acorn-sized nuts during early autumn. The nuts are often chopped and added to salads and soups.

Lily o' War

Lilies o' War are bulbous plants with purple flowers. The surface of their stems and leaves are covered in small, toxic spines that irritate the skin and can trigger severe allergic reactions. Consuming any part of the plant can become deadly without immediate medical care.


A popular grain that is ground into flour. It is named after Alial, the Sun.


A grain that is used for animal feed or sold as a cheap soup ingredient. It is named by an old belief that it would only grow when Oreon's moon Et was above the horizon.


Oilmouse has sweet seeds that are used in some dessert dishes.

Wanderer Mushrooms

An edible fungus so named because the mushroom patches appear to move over time. It is a common meat substitute.

Storyteller Cactus

A large succulent that bears pink waxy fruit on the tips of its leaves. Some report that the fruit allows the consumer to experience a play performed by the cactus.


A starchy tuber that is used to make flour and thicken soups. It is named after the pale starchy juice it releases when cut.


A sea plant used in some Ilomiran dishes as a garnish or edible container.


A plant with edible flowers that are used as an ingredient in some sweet teas.

Common and Notable Animals of Oreon


A rodent-like animal domesticated to help hunt. Wild ones are uncommon, but do exist. They stand about 0.7m tall.


A large animal kept for meat. They are happy eating almost anything and spend most of the day sunbathing. They stand about 1.2m tall.

Green Littersift

A round, feathered animal that roams forests in search of bugs, nuts, and fallen fruit. They stand about 30cm tall.

Brown Littersift

A round, feathered animal that scratches through forest floors for bugs. They stand about 15cm tall.


A flat-bodied fish that slowly swims through reefs eating small fish. They are about 1m long. They are occasionally caught for making some seafood soups.