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Skipping Stones to Lonely Homes (2015) — Throwing Stones Across Islands, the Free PuzzleScript Game That Fathered Two Descendants
On 31 August 2015, London-based puzzle designer Alan Hazelden quietly published a free browser game on his own site: Skipping Stones to Lonely Homes. A Sokoban-lineage puzzle built on indirect action — throwing stones whose ripples move distant lilypads — it is, by Hazelden's own account, the prototype behind the 'spiritual successor' A Monster's Expedition (2020), and one of the starting points for Jonathan Blow's decade-in-the-making Order of the Sinking Star (2026). This piece traces how one free hobbyist game fed into two major descendants a decade later.
Simon Tatham's Portable Puzzle Collection (2004) — 40 Puzzles, Freshly Generated for 22 Years
In 2004, British engineer Simon Tatham — also known as the author of PuTTY — released a free collection of single-player logic puzzles. From Sudoku and Minesweeper to the loop-drawing Loopy and the bridge-building Bridges, all 40 puzzles are freshly generated by computer on every run. Written purely to solve a portability annoyance, this hobby project became, twenty years later, the foundation of an AI algorithmic-reasoning benchmark.

