by Andrew Schultz.
Threediopolis is an amusing puzzler containing pure wordplay. Figuring out how to work the game is a puzzle in itself. From there on, the puzzle-solving approach is similar to solving cryptic crosswords.
It’s a straightforward game, with slightly silly room descriptions and an interesting mechanic. Very, very gentle hints and prompts are built-in, which makes gameplay less frustrating, especially since a few of the answers were very obscure.
But if you prefer, there are hints available on the ifdb/ifarchive site (along with download links of the zblorb file). It’s a polished game, great for a half-hour or so of word-guessing with some really clever puzzles.