rb labs / products

world geography memory games

build real map intuition through daily puzzles, an interactive globe, and casual games that make countries, capitals, borders, land area, populations, flags, and languages easier to recognize.

three shared daily puzzles — choice, chance, and locate — plus a full library of casual modes, including language recognition powered by 171,873 real-world samples across 351 playable languages. play in the browser, no account required.

meridian
meridian flag mode — a 3D globe with the Republic of the Congo flag asking which country flies this flag, with four multiple-choice countries

two ways to know the world

one shared daily.
endless casual.

daily

three fresh puzzles every day — choice asks you to identify flags from four options, chance gives you mixed geography prompts without options, and locate puts ten capital cities on the globe. the same set is shared by everyone, with one attempt and a daily leaderboard.

casual

explore the whole atlas at your own pace: place countries and capitals on an interactive globe, compare population and land area, trace borders, identify languages from real text samples, and solve flag, capital, population, border, and world scrambles. every mode has its own leaderboard.

language recognition

read the world in its own words.

the languages mode shows you a real text sample and asks you to identify the language from four choices. it is a different kind of geography game: less about memorizing a flag, more about learning the visual texture of how the world speaks.

meridian currently has 351 playable languages supported by 171,873 accepted real-world language samples. the broader catalog contains 26,773 catalogued languoids through glottolog's hierarchy, but the playable number is intentionally narrower and more honest.

195
gold · 200+ samples
71
silver · 50–199 samples
85
bronze · 10–49 samples
53
limited · 1–9 samples

17 official languages still need more samples from another corpus or source before they can meet the stronger coverage thresholds.

daily challenges & casual modes

learn world geography the way it sticks.

every day brings three shared puzzles: guess flags from four choices, fill in the blank from a mixed geography prompt, and place capital cities on the globe. build a daily streak, then check where you land on the leaderboard.

when you want more, casual opens up the whole atlas — match countries to their capitals, compare populations and land sizes, trace land borders in the fewest hops, identify languages, and rebuild country names from scrambled letters. it's a flag quiz, a map game, and a geography trainer in one: quick enough for a daily habit, deep enough to genuinely know the world by sight.

credits

know the world by sight.

lead designer & creator — blaize rouyea

a product by rb labs. play meridian now and start remembering the flags.

meridianflags.com