I declare it is the satisfaction of fundamental human needs - common to every person on the planet no matter who or where they're from.
Each video game is essentially a new strategy to try to meet those fundamental human needs - which sometimes fails, other times succeeds, depending on the game design, execution of a concept and if the original idea was even a good one to begin with.
Often I see people say "because its fun", but I think thats just a lazy excuse because if I ask those people what does "fun" mean they'll either come up with nothing or something more convoluted than what nature would suggest.
I wrote an game design related article that goes into depth of this. I'd like to hear your thoughts on this.
https://docs.google.com/document/d/1JIuPw_kcbazTQX1hFxcadtWpvKi5tzdFKAS_UhCwihE/edit?usp=sharing(Its illustrated with cool AI pics too!)