Random Events

There are a few random events that can occur while you are playing.

Rain
During this event, drops of rain fall from the sky for a short duration. Silt can spawn on the ground during this time

Aurora Borealis
During this event, the sky box changes to depict the northern lights. Also, your oxygen and temperature don't drop while in the water, which can make the event very useful.

UFO
A red UFO can occasionally spawn in the sky, which will fly from one end of the map to the other. On the UFO is an NPC and a piece of Uranium.

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During this event, the sky box changes to a squidward meme about folding paper, and loud gibberish can be heard. Various objects fall from the sky, some of which appear to be from bosses. Furthermore, the item "When you uninstall cs:source" also drops from the sky.