Recently I gave an interview with VICE Benelux about some of the psychological mechanisms that underlie completionism in gaming: our desire to finish each and every aspect about a game.
The article is in Dutch, but can be found here: https://www.vice.com/nl/article/m7v3xp/waarom-kan-je-sommige-games-in-godsnaam-niet-wegleggen
For those who would like to read a little about it in English, I've also written a short blog about it on my own website, which you can find here!
https://nastasiagriffioen.com/2022/01/06/the-relief-of-completion/
