The Sickness would set in after suffering from The Thirst for too long, slowly draining the player's health until he drank from a Well or died.

This game mechanic made surviving a night without access to a well difficult, but not impossible. If the player had enough pills, it was possible to survive the night without drinking from a well. The sickness would vanish at sunrise.

As of Alpha 6.0, this mechanic has been removed.

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