--- title: "Mysteries of LONG0751, partly answered" url: https://daily.dev/posts/mysteries-of-long0751-partly-answered-upmm6hlqk source_url: https://quuxplusone.github.io/blog/2026/01/19/long0751-map-mysteries-2/ type: article source: "Arthur O'Dwyer" published: 2026-01-19T05:17:41.425Z updated: 2026-01-19T05:18:03.664Z tags: ["game-development", "reverse-engineering"] reading_time: 10 upvotes: 0 comments: 0 language: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # Mysteries of LONG0751, partly answered **[Arthur O'Dwyer](https://daily.dev/sources/quuxplusone)** · 10 min read · 0 upvotes · 0 comments ## Summary Deep analysis of LONG0751, a variant of Colossal Cave Adventure, comparing the recovered 1982 game with Dennis Donovan's 1980 map to theorize about a missing intermediate version. The investigation uses room and object numbering as stratigraphic evidence to trace the game's evolution, revealing how puzzles like the well-bottom flute and helicopter arc were likely added incrementally. Key findings include vestigial treasures in the data file, differences in the recovered LONG0501 version, and insights into how state-changing objects were implemented through PROP values versus duplicate objects. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [LONG0751: Mysteries of Donovan’s map](https://daily.dev/posts/long0751-mysteries-of-donovan-s-map-wnh7kjfus) · Arthur O'Dwyer · 0 upvotes · 0 comments - [LONG0751 has been found\!](https://daily.dev/posts/long0751-has-been-found--h0o9scgia) · Arthur O'Dwyer · 0 upvotes · 0 comments - [Adventure: Is there light in the cobble crawl?](https://daily.dev/posts/adventure-is-there-light-in-the-cobble-crawl--oc1i9d4va) · Arthur O'Dwyer · 0 upvotes · 0 comments - [Adventure: Walking on the ceiling](https://daily.dev/posts/adventure-walking-on-the-ceiling-uvtamxrnz) · Arthur O'Dwyer · 0 upvotes · 0 comments - [Endless - A dive into a C64 game](https://daily.dev/posts/endless---a-dive-into-a-c64-game-nfcnyhruj) · A Day in the Life Of · 0 upvotes · 0 comments --- Tags: [#game-development](https://daily.dev/tags/game-development), [#reverse-engineering](https://daily.dev/tags/reverse-engineering) [View this post on daily.dev](https://daily.dev/posts/mysteries-of-long0751-partly-answered-upmm6hlqk)