Wormillion’s pitch is simple: name a place, and if it’s obscure, your worm digs deeper. But what does “obscure” actually mean in the game’s scoring? It’s not about exotic spelling or how remote a place feels. Wormillion compares English Wikipedia readership within each category. Here is how that works, using the game’s own river-round example.
What “obscure” actually means in Wormillion
The site says it plainly: “We compare English Wikipedia readership within each category. Less-read places get a higher obscurity score.”
So “obscure” is a readership stat, not a judgment about the place itself. A tiny river can be heavily read if it’s famous for some reason, and a large river can be rarely looked up. What matters is how much attention the answer gets from English Wikipedia readers compared with other answers in the same category.
That last part is important. A river is compared with other rivers, a mountain with other mountains, a city with other cities. The game isn’t using one global popularity ranking for all 32,845 places in its field guide. It ranks within the category of the prompt.
The Nile, the Deseado, and the Chalaronne
Wormillion’s site walks through one river round with the prompt “Name a river.” These are the real answers and scores:
| Answer | Country | Obscurity | Points |
|---|---|---|---|
| Nile | Sudan · Egypt · Uganda · South Sudan · Burundi · Rwanda · Ethiopia | 0.0% | 100 |
| Deseado River | Argentina | 35.0% | 415 |
| Chalaronne | France | 75.2% | 777 |
The Nile is the familiar baseline. It has 0.0% obscurity, so it earns 100 points — a perfectly fine score, but it doesn’t give your worm much depth.
The Deseado River is a lesser-known Argentine river. Its 35.0% obscurity earns 415 points.
The Chalaronne, a small French river, is far less read. Its 75.2% obscurity earns 777 points.
The lesson is consistent: every valid answer scores, but the less-read answer scores more.
Working backward from the published scores
The published examples line up cleanly with a simple formula. Start at 100 points for 0% obscurity, then add roughly 9 points for each percentage point of obscurity.
- Nile: 100 + (0.0 × 9) = 100
- Deseado River: 100 + (35.0 × 9) = 415
- Chalaronne: 100 + (75.2 × 9) = 776.8, rounded to 777
That reproduces all three published scores. Wormillion doesn’t show a full unrounded formula, so treat this as the practical model the examples suggest. If the pattern continues upward, a 100%-obscurity answer would land at 1,000 points, but that maximum isn’t officially stated.
Tip: When you’re torn between two valid answers, ask “Which one would fewer English Wikipedia readers have looked up?” Choose that one. It’s the surer path to a deeper dig.
Why category matters so much
Because readership is compared within each category, your mental model of “obscure” has to be category-specific. The Nile isn’t penalized for being an African river. It scores low because it’s heavily read among river articles. In a mountains round, a familiar peak like Mount Everest would work the same way: high readership, low obscurity, solid but not spectacular points.
That’s why the field guide groups its places into nine categories — rivers, mountains, cities, islands, countries, capitals, lakes, deserts, and seas and oceans. The scoring is always peer-to-peer.
A quick FAQ
Why does the Nile only get 100 points?
Because it’s not obscure at all in Wormillion’s system. 0.0% obscurity means it’s the well-known baseline. It still earns points, just not the deeper bonus.
Can I type any obscure-sounding name and score big?
No. Your answer first has to be “a place in the requested category that fits every condition.” Obscurity only matters after the answer is valid.
Is this based on Wikipedia pageviews?
Wormillion specifically says “readership” on English Wikipedia. The raw measurement details aren’t shown, but the relationship is clear: less read equals higher obscurity, and higher obscurity equals a deeper worm.
