Implement random or preset natural and other catastrophes and events:

  • moons and planets colliding,
  • devastating volcano eruptions,
  • devastating earthquakes,
  • devastating tsunamis,
  • devastating tornadoes,
  • military ship crash,
  • commercial ship crash,
  • famine,
  • new plagues and diseases,
  • etc.

These could lead to economic, political, and other kinds of problems.