How to write a good puzzle

• MIT mystery hunt guide to writing good puzzle hunt puzzles, with examples from past mystery hunts
• Puzzle Wiki’s puzzle writing resources
• How to write a good BANG puzzle – Bay Area Night Game wiki
• Foggy Brume’s tips for puzzle-writing: part 1, part 2 and part 3

• The Escape This Podcast team on how they design puzzles (podcast episode)
• Five Things New Designers Should Know About Escape Room Puzzle Creation, a talk given by Errol Elumir during RECON (video)
• PostCurious on what makes a good puzzle
• Elyot Grant – 30 Puzzle Design Lessons (part 1) (part2) (part3) (videos)

Tools

• dCode: for all your codes and ciphers
• Nutrimatic: a very powerful word finding and pattern matching tool 
• Qat: similar to nutrimatic
• Litscape: a lot of word lists
• F-puzzles: a sudoku setting tool
• Xqw: crossword program
• Noq: logic puzzle solver
• Breakout.edu: various puzzle and design tools

Other useful links

• List of lists of lists: a lot of lists
• Sets of things: sets
• Puzzle wiki: wiki full of puzzle things and resources
• Cryptics.fandom: for all your cryptic clue needs

Further inspiration

• Get inspired by the greats with our puzzling playlist