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Happiness is a measure of how much the people are behind you when it comes to colonizing other planets.  Without this backing your people simply aren't motivated enough to explore outside their known world.  There is no cap to the amount of happiness you can accumulate on each planet, and each planets happiness is independent from the others.

Happiness can be affected in several ways:

  • Buildings that give you +happiness/hr, such as the University, Entertainment District, Park, Luxury Housing, Capital, and theme Park.
  • Adding food to a park or theme park, even before the party is over and you get the party bonus (this can be immensely useful when construction times are very, oh so very slow or booked in advance for days).
  • If you have pollution, you lose 1 happiness per point of pollution that isn't sequestered in a Waste Sequestration Well, Ravine, crater, or Interdimensional Rift.
  • Building new buildings that use food give you happiness equal to the amount of food used, provided you have at least 4 types of food available (more than 4 types doesn't give more happiness than 4); demolishing buildings subtract happiness based on the food that was used to build them.
  • if you have exactly 3 types of food, happiness doesn't change
  • If you have less than 3 types of food, then building and upgrading buildings will cause you to lose happiness.
  • Having negative plots affects happiness generation as well.

Each planet that you colonize requires a single lump sum of happiness that is subtracted from your current happiness of the planet you launch your colony ship from, and each additional planet takes an increasing amount of happiness.

Negative happiness increases the build time for everything on the planet by 1% for every 1,000 negative happiness.  The only exception to this is glyph buildings which only have longer build times based on the building level.  The Essentia cost of rush completing a building in the Construction Ministry does not increase due to unhappiness levels.

There is also a cap (9,223,372,036,854,775,807) for the maximum amount of happiness (or theorically, UNhappiness) a colony can have.

Here is a table depicting the first 8 colony costs for each growth affinity.

1 2 3 4 5 6 7
 1 100000 100000 100000 100000 100000 100000 100000
 2 274000 273000 272000 271000 270000 269000 268000
 3 750760 745290 739840 734410 729000 723610 718240
 4 2057083 2034642 2012365 1990252 1968300 1946511 1924884
 5 5636406 5554572 5473633 5393581 5314410 5236115 5158687
 6 15443752 15163982 14888280 14616604 14348907 14085148 13825282
 7 42315881 41397669 40496121 39610995 38742049 37889047 37051754
 8 115945512 113015635 110149449 107345795 104603533 101921536 99298699

Keywords: Happiness happy Waste

2Tralala French: "Negative happiness increases the build time for everything on the planet by 1% for every 10,000 negative happiness.   <--- actually more like 1% for every 1000 negative happiness."
4rammo: "updated the wiki on that"
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