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Games built on open knowledge — Wikipedia, public data, free APIs. 11 games live on factorday.com.

Wikipedia Games (8)

WikiTrendle

A daily Wikipedia word game. Guess words connected to a trending Wikipedia topic. 50,000+ players worldwide.

Two Wikipedia articles — which one has more views? Popularity is harder to predict than you think.

Two Wikipedia articles — which one is longer? A surprisingly hard game about the depth of human documentation.

Two Wikipedia articles — which one has been translated into more languages? A window into what the world considers worth knowing.

Walk through as many Wikipedia articles as possible linked to a city. How far can you roam before the trail runs cold?

Guess how frequently words appear across Wikipedia. A game about what the world talks about most.

Which one doesn't belong? Four Wikipedia topics — find the odd one out. Pattern recognition meets encyclopedic breadth.

Unscramble words pulled from Wikipedia articles. Fast, satisfying, and endlessly varied.

Other Games (3)

A species appears. Is it threatened, endangered, vulnerable, or least concern? A game about what we are losing and what remains.

The endless runner — but the obstacles are real NASA events. Dodge solar flares, asteroid flybys, and cosmic phenomena on your way through space.

Daily mini crosswords. Small grids, sharp clues, done in minutes.