Case study

ZT1-Engine: reconstructing Zoo Tycoon 1 from zoo.exe

ZT1-Engine reimplements Zoo Tycoon 1 for modern Windows by recovering game rules from zoo.exe and comparing behavior with the original. It reads art, sound, and other files from the player's installation and includes a lab for examining original addresses and execution traces. The author describes base-game freeform play as available in alpha, while expansion features and save parity remain incomplete.

Targets: Game
Category: Independent reconstruction cases
Relationship: Independent reconstruction project
Sources reviewed: 2026-11-06
Evidence class: C1 partial scope or analysis entry

Stars: 17
Last commit: 2026-11-07
Language: C++
License (GitHub): MIT

GitHub data as of 2026-11-10

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Evidence

Demo screenshot from the project's public documentation

Observed: Demo documented; the documentation covers part of the feature set.
Scope: Partial
Checked: 2026-11-09

How evidence classes are assigned

Requirements & limits

Prerequisites: Windows 10 or 11, 64-bit, and the player's own Zoo Tycoon 1 installation are required.
Prerequisites: Building from source requires Python 3, CMake, and Visual Studio 2022 C++ build tools.
Limits: The project is alpha; Dinosaur Digs and exact save-state parity remain incomplete.
License: MIT License.

Cite

BibTeX

@misc{zt1-engine-case,
  title = {{ZT1-Engine: reconstructing Zoo Tycoon 1 from zoo.exe}},
  howpublished = {\url{https://github.com/AlexC1991/zt1-engine}},
  url = {https://github.com/AlexC1991/zt1-engine},
  urldate = {2026-11-06},
  note = {Awesome REA entry: \url{https://awesomerea.org/resources/zt1-engine-case/}}
}

Plain text

ZT1-Engine: reconstructing Zoo Tycoon 1 from zoo.exe. https://github.com/AlexC1991/zt1-engine (accessed 2026-11-06). Awesome REA entry: https://awesomerea.org/resources/zt1-engine-case/

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Primary sources

README.md GitHub · AlexC1991/zt1-engine · Revision 6aec71d