The urge to collect all the items, achievements or secrets in a game.
"Vaguely yes, there’s mentions of collecting them all and the goal is simply to collect."
"There is a museum that when you get certain items you can complete for more items or characters."
"Rarer cards tend to show up more frequently when you near the end of collecting a set."
"There are hundreds of characters that are obtained either through a random draw or through real money."
"I mean, the game doesn't "urge" you to do this, but if you want to be competitive, it certainly is helpful to have all the cards. Although again, it is far from necessary. And the game doesn't actively force it down your throat or anything."
"There is a catalog, which shows a crown icon if you collect every item in a set."