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Documented source code for classic 8-bit game The Sentinel

Rob Beschizza
Jan 09, 2026
∙ Paid

Screenshot: The Sentinel

Geoff Crammond’s The Sentinel, a tense 3D puzzle game that made the most of 8-bit computing power, was an instant classic upon release in 1986. A reconstruction of the source code is available on github, and now Mark Moxon has published a website presenting it in annotated form with historical context: “It’s a lot more fun to exp…

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