completionism

Etymology

From completion + -ism.

completionism means The goal of achieving every objective in a game, as opposed to merely doing enough to win. Lexicurio rates it Sui generis — a strength score of 90 out of 100.

noun

The goal of achieving every objective in a game, as opposed to merely doing enough to win.
The goal of collecting, visiting, experiencing, etc. every item of a set.“Lee's crossover idea was a sales bonanza, propelling Marvel readership inot unheard-of spheres of completionism”