challenging

• Gisnep – Daily quote-revealing word puzzle (Word)
• Octordle – Guess eight Wordle-style words at once (Wordle-like)
• Cartesian – Like Wavelength, but with a two spectra instead of one (Social Judgment)
• NYT Crossword – The most famous crossword puzzle on Earth (Trivia)
• The Wiki Game – The best Wikiracing game on the web (Trivia)
• TimeGuessr – Guess the year and location of historical photos (Trivia)
• Heardle – Guess the song from a short audio clip (Music and Sound)
• Geoguessr – Guess the location from Google Street View images (Geography)
• Spelling Bee – Make as many words as you can from 7 letters (Word)
• Semantle – Guess the secret word with semantic similarity (Word)
• Flagle – Guess the country flag with Wordle-like gameplay (Geography)