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HyperRogue also has special modes which experiment with other geometries (spherical, and elliptic which is non-orientable). Hydra Slayer has Mobius strip and Klein bottle levels.
Zeno Rogue
on /blog/38
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 2026 

May 2026

World Cup stickers 2026

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A new puzzle every day
Mixing Wordle with other games

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Christmas card 2025

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The partridge puzzle

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A nonogram alphabet

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 2024 

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A regular expression Christmas puzzle
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Zines, pt. 2

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