completionist

American  

[kuhm-plee-shuh-nist] / kəmˈpli ʃə nɪst /

noun

1. (in a video game) a player who attempts to complete every challenge and earn every achievement or trophy.

   I’m not really a completionist, so I skipped the side missions and focused on the main story quests.

2. completist.

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Etymology

Origin of completionist

First recorded in 1970–75; completion + -ist

Example Sentences

I’m not a big enough Resident Evil completionist to fill those guides, but I got the palpable sense of watching something where the creators were showing their homework to gain viewers’ trust.

From The Verge • Nov. 23, 2021

And every mission features a familiar set of challenges, feats, discovery tasks, and other completionist checklist items that can keep you busy on a single level for well over 10 hours of play time.

From The Verge • Jan. 27, 2021

I was happy to do his ten or so main missions, but I’m not interested in being a completionist in the face of such tedium.

From Forbes • Jul. 20, 2015