Master of Orion Wiki

When a random event occurs a GNN report will pop up to inform you about it. Random events can be beneficial or harmful.

List of random events[]

Event Type Effect
Population boom Positive Growth requirements halved in colony.
Wealthy merchant Positive Empire receives between 100 and 700 Icon credits.png as a donation.
Major breakthrough Positive Instant discovery of currently researched technology.
Mineral upgrade Positive Planet mineral richness increases by one rank.
Deadly plague Negative Icon food.png Food output halved unless a cure is researched.
Computer virus Negative Icon research.png Research points accumulated for current technology halved.
Mineral downgrade Negative Planet mineral richness decreases by one rank.
Supernova Negative All planets in the system reduced to asteroid belts unless the event is prevented.
Minor quake Negative Two buildings randomly destroyed in colony.
Violent quake Negative Half the buildings destroyed and half the population killed in colony.
Industrial accident Negative 95% pollution on colony.
Mysterious explosion Negative One random ship in the fleet destroyed.


A sun is about to supernova which destroys an entire system, reducing all planets to asteroid belts. To stop this you have to assign population in the system to research a solution. If you have produced enough science points in a random amount of turns the supernova can be averted.

Deadly Disease[]

A deadly disease strikes one of your planets and halves population growth (effectively halving food production). To find a cure you have to assign population to research. After enough research points are accumulated, a cure is found and the food production is restored.

Planet mineral richness increase/decrease[]

Either through a random discovery of new mineral deposits or random depletion of existing ones the production rating of a planet can increase or decrease one grade, respectively. The player has no control over discovery or depletion of mineral deposits.


An earthquake strikes one of your planets. Earthquakes come in minor or major varieties, both will destroy buildings on the planet in varying amounts.

Computer Virus[]

A computer virus is detected and in effect cuts your total research In half.

Population Boom[]

A population boom doubles the growth rate at a planet for a random amount of turns, until the population boom subsides. Both the start and the end of the event is announced over GNN.