Zoo Tycoon

Zoo Tycoon (PC, 2001) has an open-source reimplementation, openzt1/openzt, and 2 other public projects, including a decompilation and a full disassembly.

Data checked 2026-10-13 · unbaked registry

Projects

openzt

ReimplementationRust; DLL-injection loader (openzt-loader); openzt-eval benchmarks LL…37 starspushed 2026-10-12GPL-3.0 licenserelease v0.1.2

WIP Reimplimentation of Zoo Tycoon (2001)

WIP reimplementation, active; ZtModArchive/zt1 has a Snowman decompile of zoo.exe

EMU

DisassemblyC++/Lua8 starspushed 2024-03-23MIT licenserelease v1.1.0-release

A modding API for the Zoo Tycoon Complete Collection that adds Lua scripting and a simple command console.

Modding API adding Lua scripting + console to ZT Complete Collection

zt1

DecompSnowman4 starspushed 2021-07-01no license

Zoo Tycoon 1's zoo.exe decompiled with Snowman

Raw Snowman decompiler output of zoo.exe

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What you need

You need your own copy of the game: these projects ship code only.

More on PC

GameMethodYearStarsLast push

PCMindustrySource releaseAgent environment201929k2026-10-11 PCosu!Source releaseReadable bytecode+1200719k2026-10-12 PCCommand & Conquer Remastered CollectionSource release202021k2025-01-16 PCRollerCoaster Tycoon 2ReimplementationAgent environment200216k2026-10-12 PCDune 2000Reimplementation199818k2026-10-11 PCAge of Empires IIReimplementation199914k2026-10-03 PCCataclysm: Dark Days AheadSource release201313k2026-10-12 PCCivilization VSource releaseReimplementation201011k2026-10-12

Found via openzt1/openzt-loader, openzt1/openzt-eval, ZtModArchive/zt1

GitHub data checked 2026-10-13. Notes are summaries from the research pass; the project pages are the authority.