Short for 'arcology', itself a word invented by architect Paolo Soleri as a combination of the
words 'architecture' and 'ecology' and which refers to the theory of building large, self-contained structures for
human habitation. 'Arco' is usually used in the context of SimCity 2000, a computer
game in which the player can build arcologies, which are enormous, odd-looking, highly expensive structures that can contain thousands of
people inside them. Three of the four arcologies in SimCity 2000 (the plymouth arcology, forest arcology and launch arcology) are often named using the word 'arco' in place of 'arcology', while the fourth simply adds the letter '
d' to the word 'arco' to form 'darco' (which the
game states is an acronym for Deurbanized ARcological COnstruct).
For arcologies in general:
Getting to the arcos is
easy, all you have to do is make a flat city, turn disasters off and then build.
For a specific
type of arcology:
I don't make
forest arcos, they don't have enough population to be worth it. I always go for launch arcos instead.